libclang: Enable requesting a larger stack for several libclang entry points using "safety" threads.
libclang: Enable requesting a larger stack for several libclang entry points
using "safety" threads.

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@118278 91177308-0d34-0410-b5e6-96231b3b80d8

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