* src/mm/boehm.c: Renamed to gc-boehm.cpp.

* src/mm/boehm.c: Renamed to gc-boehm.cpp.
* src/mm/nogc.c: Renamed to gc-none.cpp.
* src/mm/gc-boehm.cpp, src/mm/gc-none.cpp: See above.
* src/mm/Makefile.am (GC_FILE): Changed names like above.

--HG--
rename : src/mm/boehm.c => src/mm/gc-boehm.cpp
rename : src/mm/nogc.c => src/mm/gc-none.cpp