Fix failing test on nightly ARM.Ubuntu1404.gcc484.CAM

Created by: zhaoqin

There are several tests failed on this nightly build test machine:

code_api|client.drwrap-test
code_api|tool.drcachesim.thumb
code_api|tool.drcachesim.simple
code_api|tool.drcachesim.TLB-simple
code_api|tool.drcachesim.phys
code_api|tool.drcachesim.multiproc