[scudo][test] Disable -Wfree-nonheap-object

As of 4f395db86b5cc11bb56853323d3cb1d4b6db5a0b which contains updates to
-Wfree-nonheap-object, a line in this test will trigger the warning. This
particular line is ok though since it's meant to test a free on a bad pointer.

Differential Revision: https://reviews.llvm.org/D97516

GitOrigin-RevId: bed888242662c2327b32b91a03635e079ad5667e
1 file changed