Reorder the PATH used during testing so $(ToolDir) and the LLVM scripts dir appear before the user path.  - This is an attempt to pick up the right executables. We should    probably be substituting the exact things we want for clang a la    the LLVM test script.
Reorder the PATH used during testing so $(ToolDir) and the LLVM
scripts dir appear before the user path.
 - This is an attempt to pick up the right executables. We should
   probably be substituting the exact things we want for clang a la
   the LLVM test script.


git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@55105 91177308-0d34-0410-b5e6-96231b3b80d8

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