Revert "Expected output of mandel when run under valgrind"
This reverts commit 6480538c4665ad8f3863b1587bf83689dec25422.
The problem was that by setting SRC_RUNTEST_OPTS=-cachegrind, the
setting SRC_RUNTEST_OPTS += -stdout-binary in mandel/Makefile was
overridden, and the binary output was mangled.
The proper thing to do is to enable cachegrind using
EXTRA_RUNTEST_OPTS=-cachegrind. I have updated