logcat: -f <non-existent-directory>/<filename> segfaults
am: 1ab87e7  -s ours

* commit '1ab87e7712cea615ecdf70e65d74d14d3fd8fa85':
  logcat: -f <non-existent-directory>/<filename> segfaults

Change-Id: Ib0f855a739c6a5bd5a77a8942c3f8cb3ddfd881c