Fixed kotlin sample app release builds
Fixed kotlin sample app release builds

Summary: Wrong proguard file.

Reviewed By: lambdapioneer

Differential Revision: D5425506

fbshipit-source-id: 3208dfa09c0ee13641ae2640ad50027d86c90344

facebook/fresco,MaTriXy/fresco,xjy2061/NovaImageLoader,facebook/fresco,xjy2061/NovaImageLoader,s1rius/fresco,facebook/fresco,xjy2061/NovaImageLoader,MaTriXy/fresco,xjy2061/NovaImageLoader,facebook/fresco,facebook/fresco,MaTriXy/fresco,xjy2061/NovaImageLoader,s1rius/fresco,s1rius/fresco,MaTriXy/fresco,MaTriXy/fresco,facebook/fresco,s1rius/fresco