* data.c (POPCOUNT_STATIC_INLINE): New macro, as a hack for popcount.

* data.c (POPCOUNT_STATIC_INLINE): New macro, as a hack for popcount.

This is ugly, but it should fix the performance problem for older
GCC versions in the short run.  I'll look into integrating the
Gnulib module for popcount, as a better fix.
See the thread starting in:
http://lists.gnu.org/archive/html/emacs-devel/2013-09/msg00474.html
(popcount_size_t_generic) [NEED_GENERIC_POPCOUNT]:
(popcount_size_t_msc) [USE_MSC_POPCOUNT]:
(popcount_size_t_gcc) [USE_GCC_POPCOUNT]:
(popcount_size_t): Use it.