CREATE_PROJECT: Escape \" in "<group>" for PBXFileReferences during w…

…riteFileListToProject

This has to be applied explicitly, as modifying ADD_FILE_REFERENCE to use SettingsQuoteVariable would be wrong (i.e. SDKROOT should not become "SDKROOT").

devtools/create_project/xcode.cpp

@@ -191,7 +191,7 @@ void XCodeProvider::writeFileListToProject(const FileNode &dir, std::ofstream &p
 		const FileNode *node = *i;
 
 		std::string id = "FileReference_" + node->name;
-		FileProperty property = FileProperty(node->name, node->name, node->name, "<group>");
+		FileProperty property = FileProperty(node->name, node->name, node->name, "\"<group>\"");
 
 		ADD_SETTING_ORDER_NOVALUE(children, getHash(node->name), node->name, order++);
 		ADD_BUILD_FILE(id, node->name, node->name + " in Sources");