clang-format: Add TypeScript detection to git-clang-format.

llvm-svn: 240128
diff --git a/clang/tools/clang-format/git-clang-format b/clang/tools/clang-format/git-clang-format
index 6a0db27..0c45762 100755
--- a/clang/tools/clang-format/git-clang-format
+++ b/clang/tools/clang-format/git-clang-format
@@ -78,6 +78,7 @@
       # Other languages that clang-format supports
       'proto', 'protodevel',  # Protocol Buffers
       'js',  # JavaScript
+      'ts',  # TypeScript
       ])
 
   p = argparse.ArgumentParser(