Fix brk/sbrk error checking. am: f36b5088 am: 1d358c8e -s ours am: f3a1f424 am: c0c1abe5 am: b6789dc3 am: d54ed72c am: 02f7869a am: 1d59a2d6 * commit '1d59a2d6': Fix brk/sbrk error checking. Change-Id: I3cc097839dfc3534f31c114c15bc89dedb6ba866