kill HAVE_STAT_ST_MTIM

Bug: 18300671
Change-Id: I92b5691924b995d9c883fc0f777c566ac4c35d1d
Remove HAVE_DIRENT_D_TYPE.

Only Windows doesn't have it, and we don't build atree for Windows.

Change-Id: Ib6e96be73340c36cdfcb3654ed540f690bf7550b
kill HAVE_INOTIFY

Bug: 18314841
Change-Id: Idfcbeb62a57f72a47eb732f085fbd1ab27302f85
Merge "Remove HAVE_DIRENT_D_TYPE."
Merge "kill HAVE_STAT_ST_MTIM"
Merge "kill HAVE_INOTIFY"