Mark the passed in "self" for a block as an object pointer so that the backend can mark it as the representative pointer for the block.
Mark the passed in "self" for a block as an object pointer so
that the backend can mark it as the representative pointer for
the block.

rdar://12001329

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@164418 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang