tree a3b5de27e8a7005a02bd30c452ed98158da2d884
parent 11b362d284b49e070813cd459584ea3dabb20b1e
author Josh Gao <jmgao@google.com> 1480458375 -0800
committer Josh Gao <jmgao@google.com> 1480458375 -0800

Correct the return types of readv and writev.

readv and writev should return ssize_t, not int.

Bug: none
Test: `m checkbuild` on bullhead
Change-Id: I934c2e8cb7bf76384b63cedfeab88e2f6b65971a