Use BASIC_FLAGS for profile feedback

Use BASIC_CFLAGS instead of CFLAGS to set up the profile feedback
option in the Makefile.

This allows still overriding CFLAGS on the make command line
without disabling profile feedback.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Makefile

@@ -1552,13 +1552,13 @@ endif
 PROFILE_DIR := $(CURDIR)
 
 ifeq ("$(PROFILE)","GEN")
-	CFLAGS += -fprofile-generate=$(PROFILE_DIR) -DNO_NORETURN=1
+	BASIC_CFLAGS += -fprofile-generate=$(PROFILE_DIR) -DNO_NORETURN=1
 	EXTLIBS += -lgcov
 	export CCACHE_DISABLE = t
 	V = 1
 else
 ifneq ("$(PROFILE)","")
-	CFLAGS += -fprofile-use=$(PROFILE_DIR) -fprofile-correction -DNO_NORETURN=1
+	BASIC_CFLAGS += -fprofile-use=$(PROFILE_DIR) -fprofile-correction -DNO_NORETURN=1
 	export CCACHE_DISABLE = t
 	V = 1
 endif