[compiler-rt] [asan][test] Fix flake in asan_lsan_deadlock test (PR #141145)

[Paul Kirth via llvm-commits]

ilovepi wrote:

if the deadlock still happens then this test only passes by accident. it either needs to deterministically fail or pass to be enabled. if it the deadlock always triggered, then we could mark it xfail until it was fixed. as is it gives no signal, and in fact seems to give a false sense that the issue is fixed.

https://github.com/llvm/llvm-project/pull/141145