logwrapper: reduce verbosity and fix usage

 - no info on normal process exit (0)
 - basename as tag, not the full path
 - fix usage, bad "-x" parameter vs "-d" in code

Change-Id: Ife72729eaee2a366bd4226f3fbe3ba074219c974
1 file changed
tree: 4af529a3ef41cf824441da8569ac830d0b2c3c04
  1. liblog/
  2. logcat/
  3. logwrapper/