* sort.cc: New file.
	* system.h [!CHECKING_P] (qsort): Redirect to gcc_qsort.
	* vec.c (qsort_chk): Use gcc_qsort.
	* Makefile.in (OBJS-libcommon): Add sort.o.
	(build/sort.o): New target.  Use it...
	(BUILD_RTL): ... here, and...
	(build/gencfn-macros): ... here, and...
	(build/genmatch): ... here.

From-SVN: r260216