Add shared iOS/macOS xcframeworks folder to gitignore

.gitignore

@@ -34,6 +34,7 @@
 /platform/xcode/ios/libraries
 /platform/xcode/ios/luajit-git
 /platform/xcode/macosx/Frameworks
+/platform/xcode/shared/Frameworks
 *xcuserdata*
 *.DS_Store
 *.dylib