bzip2: do not overwrite CC in Makefiles so that BUILD_32BIT works.

srcpkgs/bzip2/template

@@ -26,3 +26,12 @@ long_desc="
 base_chroot=yes
 subpackages="bzip2-devel"
 Add_dependency run glibc
+
+pre_build()
+{
+	# Do not overwrite CC!
+	for f in Makefile Makefile-libbz2_so; do
+		sed -i -e "s|\(CC\)\(=gcc\)|\1?\2|g" \
+			${wrksrc}/${f} || return 1
+	done
+}