Make clang/test/lit.cfg pre-scan the RUN line looking for tool names, and substitute fully qualified path names pointing to the build directory.  This ensures we're testing the just-built tools.
Make clang/test/lit.cfg pre-scan the RUN line looking for tool names,
and substitute fully qualified path names pointing to the build
directory.  This ensures we're testing the just-built tools.


git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@204493 91177308-0d34-0410-b5e6-96231b3b80d8

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