[compiler-rt] [NFC][sanitizer] Accept ETIMEDOUT in getpwnam_r_invalid_user.cpp (PR #186538)

[Thurston Dang via llvm-commits]

thurstond wrote:

getpwnam_r_invalid_user.cpp timing out might have been a canary in the coalmine. This patch landed in https://lab.llvm.org/buildbot/#/builders/72/builds/17558, which now has the buildbot as a whole timing out, but taking 4+ hours to do so.

Anecdotally, prior to this patch, the buildbot used to fail on getpwnam_r_invalid_user.cpp in under 4 hours.

https://github.com/llvm/llvm-project/pull/186538