test: add SIGTRAP to test-signal-handler

Backport-PR-URL: #38051
Co-authored-by: BoHong Li <a60814billy@gmail.com>

PR-URL: #36368
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>

test/abort/test-signal-handler.js

@@ -18,6 +18,6 @@ if (process.argv[2] === 'child') {
                           ['--expose-internals', __filename, 'child'],
                           { stdio: 'inherit' });
   // FreeBSD and macOS use SIGILL for the kind of crash we're causing here.
-  assert(child.signal === 'SIGSEGV' || child.signal === 'SIGILL',
-         `child.signal = ${child.signal}`);
+  assert(child.signal === 'SIGSEGV' || child.signal === 'SIGILL' ||
+          child.signal === 'SIGTRAP', `child.signal = ${child.signal}`);
 }