Allow passing custom c-flags to mkbuildinf.pl in order to pass
flags without any build host references

Upstream-Status: Inappropriate [OE specific]

Signed-off-by: Juro Bystricky <juro.bystricky@intel.com>

--- Makefile	2018-03-06 14:50:18.342138147 -0800
+++ Makefile	2018-03-06 15:24:04.794239071 -0800
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -55,7 +55,7 @@
 all: shared
 
 buildinf.h: ../Makefile
-	$(PERL) $(TOP)/util/mkbuildinf.pl "$(CC) $(CFLAGS)" "$(PLATFORM)" >buildinf.h
+	$(PERL) $(TOP)/util/mkbuildinf.pl "$(CC_INFO)" "$(PLATFORM)" >buildinf.h
 
 x86cpuid.s:	x86cpuid.pl perlasm/x86asm.pl
 	$(PERL) x86cpuid.pl $(PERLASM_SCHEME) $(CFLAGS) $(PROCESSOR) > $@