Update to SBCL 1.3.16

changes in sbcl-1.3.16 relative to sbcl-1.3.15:
  * optimization: various small tweaks give around 5% faster garbage
    collection
  * bug fix: better detection of when an impossible code path does
    not need a warning.  (lp#1668619)
  * bug fix: stronger attempts to disable position-independent
    executable building.  (lp#1668986, patch from Mark Wright)
  * bug fix: OPEN :IF-EXISTS NIL signalled a condition on Windows.
    (lp#1674437, reported by Jan Idzikowski)

changes in sbcl-1.3.15 relative to sbcl-1.3.14:
  * minor incompatible change: the reader will when feasible create
    new symbols using a BASE-STRING for the print name.  Additionally,
    string literals can favor the base-string type if desired, though
    the default is to always return UTF-32 strings for compatibility.
    A preference for base-string does not disable reading Unicode.
    The choice is controlled via (SETF READTABLE-BASE-CHAR-PREFERENCE).
    If Unicode was disabled at build time, this setting does nothing.
  * enhancement: SBCL generates more debug information by default.
  * enhancement: type errors provide context information, such as which
    variable is being bound, which slot of which structure is being set.
  * enhancement: if #+immobile-symbols is in build-time *FEATURES* (not
    enabled by default), then symbols will never be moved in memory
    except by SAVE-LISP-AND-DIE. Immobility has helpful implications for
    code generation as well as interaction with foreign routines.
    This feature can only be enabled if #+immobile-space is enabled.
  * enhancement: undefined function errors can be restarted on x86-64, to
    either retry calling the function again or call a user supplied function.
  * enhancement: sb-ext:restrict-compiler-policy accepts an upper bound in
    addition to a lower bound.
  * enhancement: #+immobile-code improves the speed of function calling.
    Some delay may be noticed when redefining an existing function
    from a saved core file however.
  * defaults change: sb-ext:*disassemble-annotate* default to NIL, due to its
    poor reliability.
  * new feature: SB-LINKABLE-RUNTIME, allowing linking with extra object
    files to help with delivery of executables.  (Thanks to Francois-Rene
    Rideau)
  * bug fix: data race in GENTEMP fixed - it can no longer return the
    same interned symbol to multiple threads if called concurrently
  * bug fix: interrupting LOADing of FASLs does not leave functions without
    source locations. (lp#540276)
  * bug fix: DYNAMIC-EXTENT-declared results of NOTINLINE local functions were
    treated as if they were actually stack allocated (lp#1659964)
  * bug fix: correctly handle the case of a non-local exit within a function
    terminating the extent of dynamic-extent, dynamic-bound variables in the
    presence of multiple-values (lp#1655011)
  * bug fix: handling of SB-SYS:WITH-PINNED-OBJECTS in the interpreters (both
    sb-eval and sb-fasteval) now actually pins objects on gencgc.
  * bug fix: AVX registers are preserved during exceptions on x86-64 macOS.
  * bug fix: (directory "SOMETHING/*/**/MORE") is no longer equivalent to
    (directory "SOMETHING/**/MORE")
  * bug fix: better console IO on Windows (lp#1660906)

changes in sbcl-1.3.14 relative to sbcl-1.3.13:
  * minor incompatible change: the SB-PCL walker no longer recognizes
    macros expanding into a DECLARE expression. This is not a language change,
    since ANSI forbids such usage (X3J13 issue DECLARE-MACROS:FLUSH).
  * enhancement: for several macros such as MULTIPLE-VALUE-{BIND,SETQ}, COND,
    DO{,*,LIST}, {RESTART,HANDLER}-{BIND,CASE}, *CASE, conditions signaled
    during macroexpansion point to the form that caused the problem more
    accurately.
  * enhancement: the "--noinform" command-line option inhibits output from
    save-lisp-and-die in addition to removing the startup banner.
  * bug fix: PROCESS-KILL failed to return errno if the system call failed
  * optimization: slightly more comprehensive treatment of the keyword
    arguments to MAKE-ARRAY in compiler transformations.

changes in sbcl-1.3.13 relative to sbcl-1.3.12:
  * enhancement: SET triggers package locks on undefined variables.
    (lp#1645152)
  * enhancement: new Windows specific option to run-program, :escape-arguments
    (lp#1503496)
  * enhancement: recompiling a MAKE-INSTANCE form with an initarg :INITARG
    CONSTANT where CONSTANT names a constant variable picks up the new value
    of CONSTANT in case it has been redefined. (lp#1644944)
  * optimization: faster TYPEP on undefined at compile-time types and upcoming
    class definitions. (lp#1082967)
  * optimization: memory consumption of each STANDARD-OBJECT instance is
    reduced by 2 words if the compact-instance-header feature is enabled.
  * optimization: CONDITION instances are quicker to allocate.
  * optimization: unoptimized calls to FILL on specialized vectors are now
    just as fast as T vectors.
  * bug fix: get-timezone returns corret DST on 64-bit Windows. (lp#1641058)
  * bug fix: cross reference information in fasls is no longer incompatible
    between different cores (lp#1648186)

(asau)