Driver: When clang is built with a VENDOR set, include the base LLVM version in the version information, to help prevent user confusion about vendor version numbers vs. LLVM version numbers.
Driver: When clang is built with a VENDOR set, include the base LLVM version in
the version information, to help prevent user confusion about vendor version
numbers vs. LLVM version numbers.

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@115915 91177308-0d34-0410-b5e6-96231b3b80d8

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