The mem-overflow test depends on -O1. This is less-secure, but that's OK
because it's just a test.
I'm not sure exactly what is wrong with the second test: various
security checks are failing, likely related to the strange way this test
binary is constructed via objcopy. My main concern was to ensure that
nothing is generally wrong with GResource, but that seems to be OK.
Since the issues are isolated to this test, and it's just a test, I
think we can safely ignore them.
