e-wm: ignore autopoint errors

| autopoint: File config.rpath has been locally modified.
| autopoint: warning: File mkinstalldirs has been locally modified.
| autopoint: *** Some files have been locally modified. Not overwriting
  them because --force has not been specified. For your convenience, you
  find the local modifications in the file '/tmp/gtAHz0tp/autopoint.diff'.
| autopoint: *** Stop.