use target c compiler, f.e. gcc wrapper for coldfire

toolchain/uclibc-ng/Makefile

@@ -158,6 +158,7 @@ $(WRKBUILD)/.installed: $(WRKBUILD)/.install_headers
 $(WRKBUILD)/.fixup:
 ifeq ($(ADK_UCLIBC_TEST),y)
 	PATH='$(HOST_PATH)' $(MAKE) -C $(WRKBUILD) \
+		CC='$(TARGET_CC)' \
 		TEST_INSTALLED_UCLIBC=1 \
 		UCLIBC_ONLY=1 \
 		UCLIBC_EXTRA_CFLAGS="$(TARGET_CFLAGS)" \

toolchain/uclibc/Makefile

@@ -157,6 +157,7 @@ $(WRKBUILD)/.installed: $(WRKBUILD)/.install_headers
 $(WRKBUILD)/.fixup:
 ifeq ($(ADK_UCLIBC_TEST),y)
 	PATH='$(HOST_PATH)' $(MAKE) -C $(WRKBUILD) \
+		CC='$(TARGET_CC)' \
 		TEST_INSTALLED_UCLIBC=1 \
 		UCLIBC_ONLY=1 \
 		UCLIBC_EXTRA_CFLAGS="$(TARGET_CFLAGS)" \