liblog: log_time add usec() and msec()

Test: build
Bug: 37254265
Change-Id: Ie7a5303e85e565800f2066e53e19a83496acae72
1 file changed
tree: e1cd7f2ab276125d00bcf973574f238a2411a309
  1. liblog/
  2. logcat/
  3. logd/
  4. logwrapper/