More release optimization options.

src/build/Common.gmake

@@ -323,7 +323,7 @@ ifdef DEBUG
  CFLAGS	+=	-ggdb
  CFLAGS	+=	-D_DEBUG
 else # RELEASE
- CFLAGS	:= -O2 $(CFLAGS)
+ CFLAGS	:= -O2 -fomit-frame-pointer -finline-functions -ffast-math -funroll-loops $(CFLAGS)
 endif
 
 -include targets.mk