Module interfaces: preserve -autolink-force-load (#24264)
Otherwise the overlays won't be force-loaded when you import them.
(This feature could possibly be scoped back at this point, but it's
not something that should be changed just by using module interfaces!)
rdar://problem/50191735
(cherry picked from commit 9b2db03451cc93049f8bb20c12bf2ff19abcf2a5)
