tools/upx: use HOSTCXX to fix build errors on mac os x

SVN-Revision: 36110

tools/upx/Makefile

@@ -21,7 +21,8 @@ include $(INCLUDE_DIR)/host-build.mk
 define Host/Compile
 	rm -f $(HOST_BUILD_DIR)/src/.depend
 	$(MAKE) UPX_LZMADIR="$(BUILD_DIR_HOST)/lzma-4.65" -C $(HOST_BUILD_DIR)/src \
-		CXXFLAGS_WERROR="" LDFLAGS="$(HOST_LDFLAGS) $(HOST_STATIC_LINKING)"
+		CXXFLAGS_WERROR="" LDFLAGS="$(HOST_LDFLAGS) $(HOST_STATIC_LINKING)" \
+		CXX="$(HOSTCXX)"
 endef
 
 define Host/Install