swift234

ARCAnalysis: Teach it about array semantic calls that are not may-release

Read only array semantic functions such as "array.get_element" only have
balanced retain/release pairs in +0 self mode. Therefore, they are only a use of
the self pointer not a may-release or a guaranteed use. This means we can more
aggressively remove retain/release pairs accross such callees.

radar://20071261

Swift SVN r25926