Write out source-blocks metadata for entry block
Write out source-blocks metadata for entry block

Summary: Remember the metadata of the entry block, even if it is not instrumented. This allows to correctly tag all blocks there.

Reviewed By: minjang

Differential Revision: D31385502

fbshipit-source-id: 475cc90c95eebe1419e7d20434f1398d9eef8410

facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex