Fixed issue wher eif dependencies caused a platform implementation to be processed twice it'd warn even if they were identical
(Needed for next Fortnite-specific CL).
[at]josh.adams
#rb na
#ROBOMERGE-OWNER: lina.halper
#ROBOMERGE-AUTHOR: andrew.grant
#ROBOMERGE-SOURCE: CL 6763211 via CL 6763215 via CL 6763217 via CL 6763219 via CL 6763240 via CL 6763246
#ROBOMERGE-BOT: ANIM (Main -> Dev-Anim) (v365-6733468)
[CL 6820758 by andrew grant in Dev-Anim branch]