Facebook iOS SDK 3.5.2

Summary:
     Bug fixes. See https://developers.facebook.com/ios/change-log-3.x/

Reviewed By: jacl

Test Plan: Release Testing.
Facebook iOS SDK 3.5.3

Summary:
     Bug fixes. See https://developers.facebook.com/ios/change-log-3.x/

Reviewed By: jacl

Test Plan: Release Testing.

@update-submodule: vendor/OCMock
Facebook iOS SDK 3.6

Summary:
     see https://developers.facebook.com/ios/change-log-3.x/

    Upgrading from 3.5
     https://developers.facebook.com/docs/tutorial/iossdk/upgrading-from-3.5-to-3.6

Reviewed By: jacl

Test Plan: Release Testing.
Merge commit '3ec37e010633f865a6e0a81cdcc834cdbe600ce8'

# By Chris Pan
# Via Chris Pan
* commit '3ec37e010633f865a6e0a81cdcc834cdbe600ce8':
  Facebook iOS SDK 3.6
  Facebook iOS SDK 3.5.3
  Facebook iOS SDK 3.5.2

Conflicts:
	src/FBUtility.m