Merge changes I596b8706,I262c0377,Iaf2bee97

* changes:
  liblog: allow event tags to include some punctuations
  liblog: logprint supports number of seconds time event field
  logcat: test: standardize rest() to let logs land when injecting
tree: ab16563ca20a9d2cf9456726c800b870cfc42a40
  1. liblog/
  2. logcat/
  3. logd/
  4. logwrapper/