am 6be460d5: Add HAVE_PREAD definition to platforms

Merge commit '6be460d5b0b60aca4e8d649e2254f8a8920f4d98' into gingerbread-plus-aosp

* commit '6be460d5b0b60aca4e8d649e2254f8a8920f4d98':
  Add HAVE_PREAD definition to platforms