Since CPP is being used with CFLAGS, it should be in lock-step with CC,

to avoid having to specify both CC and CPP for the build.

Signed-off-by: Jan Beulich <jbeulich@novell.com>

config/StdGNU.mk

@@ -1,7 +1,7 @@
 AS         = $(CROSS_COMPILE)as
 LD         = $(CROSS_COMPILE)ld
 CC         = $(CROSS_COMPILE)gcc
-CPP        = $(CROSS_COMPILE)gcc -E
+CPP        = $(CC) -E
 AR         = $(CROSS_COMPILE)ar
 RANLIB     = $(CROSS_COMPILE)ranlib
 NM         = $(CROSS_COMPILE)nm