autocargo: fixup scm/mononoke/mononoke_types/if
autocargo: fixup scm/mononoke/mononoke_types/if

Summary: This fixes build for mononoke_types thrift library

Reviewed By: aslpavel

Differential Revision: D18113112

fbshipit-source-id: d8c47819ced49b43d68e83437d6ace2eed52aa5c

facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift