message: [lldb-dotest] Set the --swift-compiler
  This sets the swift compiler in the lldb-dotest wrapper. We have the
  path to swiftc avaialable in CMake, so it is just a matter of updating
  the python wrapper.
diff: @@ -4,11 +4,12 @@ import os
  dotest_path = '@LLDB_SOURCE_DIR@/test/dotest.py'
  dotest_args = '@LLDB_DOTEST_ARGS_STR@'
  +swiftc = '@LLDB_SWIFTC@'
  if __name__ == '__main__':
  # FIXME: It would be nice if we can mimic the approach taken by llvm-lit
  # and pass a python configuration straight to dotest, rather than going
  # through the operating system.
  - command = '{} -q {} {}'.format(dotest_path, dotest_args, ' '.join(
  - sys.argv[1:]))
  + command = '{} -q {} --swift-compiler {} {}'.format(
  + dotest_path, dotest_args, swiftc, ' '.join(sys.argv[1:]))
  os.system(command)
  