message: Add ASAN llvm build directory variants to
  get_llvm_bin_dirs().
diff: @@ -650,8 +650,11 @@ def get_llvm_bin_dirs():
  "llvm-build/Release/x86_64/bin",
  "llvm-build/Debug/x86_64/bin",
  "llvm-build/Ninja-DebugAssert/llvm-macosx-x86_64/bin",
  + "llvm-build/Ninja-DebugAssert+asan/llvm-macosx-x86_64/bin",
  "llvm-build/Ninja-ReleaseAssert/llvm-macosx-x86_64/bin",
  + "llvm-build/Ninja-ReleaseAssert+asan/llvm-macosx-x86_64/bin",
  "llvm-build/Ninja-RelWithDebInfoAssert/llvm-macosx-x86_64/bin",
  + "llvm-build/Ninja-RelWithDebInfoAssert+asan/llvm-macosx-x86_64/bin",
  ]
  for p in paths_to_try:
  path = os.path.join(lldb_root_path, p)
  