Merge pull request #11535 from swiftlang/bwilson/print-headers-feature-flag

[clang] Add features.json entry for "print-headers-direct-per-file"

Author: bob-wilson

clang/tools/driver/features.json

@@ -40,6 +40,9 @@
     },
     {
       "name": "extract-api-supports-cpp"
+    },
+    {
+      "name": "print-headers-direct-per-file"
     }
   ]
 }