Merge pull request swiftlang#79229 from compnerd/ignore-me

git: ignore in files in the Runtimes

Author: compnerd

.gitignore

@@ -96,3 +96,4 @@ Runtimes/**/*.yaml
 Runtimes/**/*.inc
 Runtimes/**/*.json
 Runtimes/**/*.modulemap
+Runtimes/**/*.in