os/signal, runtime: fatal signal 33 on android-arm64-corellium due to AllThreadsSyscall rewrite

[prattmic]

android-arm64-corellium failed on https://go.dev/cl/383434. It would seem that signal 33 is fatal on that builder for some reason.

cc @bcmills @aclements

[dmitshur]

CC @changkun in case the android-arm64-corellium builder configuration is relevant in this issue.

[changkun]

The current connected (two) android corellium builders should work as expected. These connected builders have no configuration change. Hence if there is a failure, it might likely be a failure due to relevant code change.

[gopherbot]

Change https://go.dev/cl/385954 mentions this issue: runtime: enable sigPerThreadSyscall handling on android