Backed out rev.1.10 (a special case for amd64). The amd64 mcount code

never needed any frame pointers for itself.

lib/libc/gmon/Makefile.inc

@@ -12,12 +12,6 @@ MAN+=	moncontrol.3
 
 MLINKS+=moncontrol.3 monstartup.3
 
-.if ${MACHINE_ARCH} == amd64
-# mcount needs to be compiled with frame pointers and without profiling
-mcount.po: mcount.c
-	${CC} ${CFLAGS} -fno-omit-frame-pointer -c ${.IMPSRC} -o ${.TARGET}
-.else
 # mcount cannot be compiled with profiling
 mcount.po: mcount.o
 	cp mcount.o mcount.po
-.endif