libgpg-error: updated to 1.38

Noteworthy changes in version 1.38
----------------------------------
* New option parser features to implement system wide configuration
  files.
* New functions to build file names.
* New function to help reallocating arrays.
* Protect gpgrt_inc_errorcount against counter overflow.
* Improve cross-building for new platforms.
* Support 64-bit big-endian MIPS architecture.
* Support static link for Windows with -lws2_32.
* Interface changes relative to the 1.37 release:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
gpgrt_fnameconcat                NEW.
gpgrt_absfnameconcat            NEW.
gpgrt_reallocarray              NEW.
gpgrt_set_confdir                NEW.
gpgrt_argparser                  NEW.
ARGPARSE_FLAG_SYS                NEW.
ARGPARSE_FLAG_USER              NEW.
ARGPARSE_FLAG_VERBOSE            NEW.
ARGPARSE_FLAG_USERVERS          NEW.
ARGPARSE_FLAG_WITHATTR          NEW.
ARGPARSE_NO_CONFFILE            NEW.
ARGPARSE_CONFFILE                NEW.
ARGPARSE_OPT_CONFFILE            NEW.
ARGPARSE_ATTR_FORCE              NEW.
ARGPARSE_ATTR_IGNORE            NEW.
ARGPARSE_TYPE_MASK              NEW.
ARGPARSE_PERMISSION_ERROR        NEW.
ARGPARSE_INVALID_META            NEW.
ARGPARSE_UNKNOWN_META            NEW.
ARGPARSE_UNEXPECTED_META        NEW.
ARGPARSE_conffile                NEW.
ARGPARSE_noconffile              NEW.
ARGPARSE_verbatim                NEW.
ARGPARSE_header                  NEW.
GPGRT_CONFDIR_USER              NEW.
GPGRT_CONFDIR_SYS                NEW.

(adam)