-fms-extensions: Alias _intNN to __intNN

Fixes build for SPEC 2000 CPU. MSVC disables these aliases under /Za,
which enables stricter standards compliance. We don't currently have any
way to disable them.

Patch by Kevin Smith!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@216270 91177308-0d34-0410-b5e6-96231b3b80d8
Objective-C. Warn if user has made explicit call
to +initilize as this results in an extra call
to this method. rdar://16628028


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@216271 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] Remove check covered by -Wobjc-missing-super-calls.

The ObjCDealloc checker is currently disabled because it was too aggressive, but this
is a good first step in getting it back to a useful state.

Patch by David Kilzer!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@216272 91177308-0d34-0410-b5e6-96231b3b80d8