add xfail for swiftlang/swift#60577

Author: justice-adams-apple

projects.json

@@ -1431,7 +1431,15 @@
         "workspace": "LineSDK.xcworkspace",
         "scheme": "LineSDK",
         "destination": "generic/platform=iOS",
-        "configuration": "Release"
+        "configuration": "Release",
+        "xfail": [
+            {
+                "issue": "https://github.com/apple/swift/issues/60577",
+                "compatibility": ["4.2", "5.0"],
+                "branch": ["main"],
+                "job": ["source-compat"]
+            }
+        ]
       }
     ]
   },