Fix brk/sbrk error checking. am: f36b5088 am: 1d358c8e -s ours am: f3a1f424 am: c0c1abe5 am: b6789dc3 am: d54ed72c am: 02f7869a am: 1d59a2d6 am: 2f78cab2 am: b472137a am: 0d7fdf14 am: 74d59a03 * commit '74d59a03': Fix brk/sbrk error checking. Change-Id: Ib27d423f22a9e8dcade2cd1e9d3e3b0469a47459