Tests: fix a warning with acc

This should fix this compiler warning observed with aCC:

Warning 863: ".../kwsys/testSystemInformation.cxx", line 93 # Result of operator << is widened from int to long.
        if (info.DoesCPUSupportFeature(1 << i))

Change-Id: Ie33521c354b11e3e852c801537c0c82f82c7041c