Fix brk/sbrk error checking. am: f36b5088 am: 1d358c8e -s ours am: f3a1f424 am: c0c1abe5 am: b6789dc3 am: d54ed72c am: 02f7869a * commit '02f7869a': Fix brk/sbrk error checking. Change-Id: I31322f99f91feb450792baa2781ad87873a0adc1