qa/common.check: avoid umask issues for --sudo valgrind runs
qa/common.check: avoid umask issues for --sudo valgrind runs

If we're unlucky the temp files created during the valgrind run will
only be readable by root ... sigh.

adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp