[ThinkLTO] Invoke build(Thin)?LTOPreLinkDefaultPipeline.
[ThinkLTO] Invoke build(Thin)?LTOPreLinkDefaultPipeline.

Previously it doesn't actually invoke the designated new PM builder
functions.

This patch moves NameAnonGlobalPass out from PassBuilder, as Chandler
points out that PassBuilder is used for non-O0 builds, and for
optimizations only.

Differential Revision: https://reviews.llvm.org/D34728

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@306756 91177308-0d34-0410-b5e6-96231b3b80d8

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