Updated Xcode.gitignore template with a Patch (#2566)

Global/Xcode.gitignore

@@ -21,3 +21,10 @@ DerivedData/
 !default.mode2v3
 *.perspectivev3
 !default.perspectivev3
+
+## Xcode Patch
+*.xcodeproj/*
+!*.xcodeproj/project.pbxproj
+!*.xcodeproj/xcshareddata/
+!*.xcworkspace/contents.xcworkspacedata
+/*.gcno