docs: Provide direct link to Ubuntu troubleshooting.
docs: Provide direct link to Ubuntu troubleshooting.

Change-Id: I6a9f8c3f3ef01abcfdaf95730139156ba443a4be

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base