[WebKit checkers] Recognize NS_RETURNS_RETAINED and CF_RETURNS_RETAINED.#157629

rniwa merged 2 commits intollvm:mainllvm/llvm-project:mainfrom

rniwa:fix-webkit-recognize-ns-cf-returns-retainedrniwa/llvm-project:fix-webkit-recognize-ns-cf-returns-retainedCopy head branch name to clipboard