ImageBuilder: respect the PROFILE parameter

Based on a patch from #10766

SVN-Revision: 29877

target/imagebuilder/files/Makefile

@@ -152,7 +152,8 @@ package_postinst: FORCE
 build_image: FORCE
 	@echo
 	@echo Building images...
-	$(NO_TRACE_MAKE) -C target/linux/$(BOARD)/image install TARGET_BUILD=1 IB=1
+	$(NO_TRACE_MAKE) -C target/linux/$(BOARD)/image install TARGET_BUILD=1 IB=1 \
+		$(if $(USER_PROFILE),PROFILE="$(USER_PROFILE)")
 
 clean:
 	rm -rf $(TOPDIR)/tmp $(TOPDIR)/dl $(TARGET_DIR) $(BIN_DIR)