am c4f4e5e2: am cd8b953e: Merge changes I2d3fef08,Idb828aa4,Ica764b1f,I9ae8887b,I376fad86,I4d00a9dd

* commit 'c4f4e5e2':
  libion: update to latest uapi header
  libion: return -errno from ion_close
  libion: add include for size_t
  libion: add NULL checks
  libion: clean up whitespace
  libion: move ion.h into local include directory