message: Fix the path to the local unittests in `runut`
  This is the same root cause as We moved the output of a bunch
  of projects to be unified. We forgot to update all the test scripts.
  In this case, the LocalTests were still using the old path that's
  _not_ under `bin/`
diff: @@ -8,9 +8,9 @@ rem That's a cppwinrt project, that doesn't use %PLATFORM% in it's path when the
  rem platform is Win32/x86.
  rem set a helper for us to find that test
  -set _TestHostAppPath=%OPENCON%\%PLATFORM%\%_LAST_BUILD_CONF%\TestHostApp
  +set _TestHostAppPath=%OPENCON%\bin\%PLATFORM%\%_LAST_BUILD_CONF%\TestHostApp
  if "%PLATFORM%" == "Win32" (
  - set _TestHostAppPath=%OPENCON%\%_LAST_BUILD_CONF%\TestHostApp
  + set _TestHostAppPath=%OPENCON%\bin\%_LAST_BUILD_CONF%\TestHostApp
  )
  call %TAEF% ^
  