Normalize line endings in fomantic build files (#19932)

Ensures consistent line endings to avoid useless diffs because there is
somthing platform-dependant in that build.

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

Makefile

@@ -704,6 +704,7 @@ fomantic:
 	cp -f $(FOMANTIC_WORK_DIR)/theme.config.less $(FOMANTIC_WORK_DIR)/node_modules/fomantic-ui/src/theme.config
 	cp -rf $(FOMANTIC_WORK_DIR)/_site $(FOMANTIC_WORK_DIR)/node_modules/fomantic-ui/src/
 	cd $(FOMANTIC_WORK_DIR) && npx gulp -f node_modules/fomantic-ui/gulpfile.js build
+	$(SED_INPLACE) -e 's/\r//g' $(FOMANTIC_WORK_DIR)/build/semantic.css $(FOMANTIC_WORK_DIR)/build/semantic.js
 	rm -f $(FOMANTIC_WORK_DIR)/build/*.min.*
 
 .PHONY: webpack