Update mm-common to 0.9.10

mm-common 0.9.10 (2016-02-06)

  * Add the MM_AX_CXX_COMPILE_STDCXX() m4 macro,
    to help other *mm projects build with C++11 or C++14 compiler support.
    This is based on AX_CXX_COMPILE_STDCXX() but doesn't need to
    be copied into projects manually.
    It is less specific than MM_AX_CXX_COMPILE_STDCXX_11.
    (Murray Cumming)

mm-common 0.9.9 (2015-11-27)

  * Fix install-time rewrite of documentation tag references with
    newer Doxygen versions.
    (Daniel Elstner)
  * MM_ARG_ENABLE_WARNINGS for C++11 when using the
    -Wzero-as-null-pointer-constant option with g++.
    (Kjell Ahlstedt) Bug #757979.
  * doc-reference.am: Don't assume all existing html files shall be rebuilt.
    (Kjell Ahlstedt) Bug #686364.

mm-common 0.9.8 (2015-07-15)

  * Add the MM_AX_CXX_COMPILE_STDCXX_11() m4 macro,
    to help other *mm projects build with C++11 compiler support.
    This is based on AX_CXX_COMPILE_STDCXX_11() but doesn't need to
    be copied into projects manually.
    (Kjell Ahlstedt) Bug #751432

mm-common 0.9.7 (2014-09-15)

  * Add doxygen-extra.css, deprecate doxygen.css.
    (Kjell Ahlstedt)
  * Update for Doxygen 1.8.
    (Kjell Ahlstedt)
  * Update skeletonmm.
    (Kjell Ahlstedt)

(prlw1)