Move main Info.plist to core bundle

Summary:
This does actually change from version to version as can be seen
when bundling both 0.40 and 0.41:

{F236391778}

Reviewed By: jknoxville

Differential Revision: D21426528

fbshipit-source-id: 53c0565f7693010a2096088af1829eab210a75cc

packer/src/packlist.yaml

@@ -1,16 +1,16 @@
 mac:
   frameworks:
     - Flipper.app/Contents/Frameworks/
-    - Flipper.app/Contents/Info.plist
     - Flipper.app/Contents/MacOS
     - Flipper.app/Contents/PkgInfo
   core:
     - Flipper.app/Contents/Resources
-    
+    - Flipper.app/Contents/Info.plist
+
 linux:
   frameworks: []
   core: []
-    
+
 windows:
   frameworks: []
-  core: []
+  core: []