[klibc] Change KLIBCARCH -> ARCH for klcc, for backwards compatiblity

klcc doesn't use the KLIBC- prefixes, as it is redundant in the context
of klcc.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
diff --git a/klcc/klcc.in b/klcc/klcc.in
index 0b66cb5..1cc4986 100644
--- a/klcc/klcc.in
+++ b/klcc/klcc.in
@@ -3,7 +3,7 @@
 use IPC::Open3;
 
 # Standard includes
-@includes = ("-I${prefix}/${KCROSS}include/arch/${KLIBCARCH}",
+@includes = ("-I${prefix}/${KCROSS}include/arch/${ARCH}",
 	     "-I${prefix}/${KCROSS}include/bits${BITSIZE}",
 	     "-I${prefix}/${KCROSS}include");