Remove NaClX86_64TargetCodeGenInfo and NaClARMTargetCodeGenInfo
Remove NaClX86_64TargetCodeGenInfo and NaClARMTargetCodeGenInfo

Summary:
They just existed before to use NaCl's custom ABIInfos; now that those are gone,
the custom TargetCodeGenInfos are no longer needed either.

Test Plan: don't break the existing tests

Reviewers: jvoung

Subscribers: jfb, cfe-commits

Differential Revision: http://reviews.llvm.org/D7234

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@227406 91177308-0d34-0410-b5e6-96231b3b80d8

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