test: account for truthy signal in flaky async_hooks tests

When the spawned child process gets closed with a signal, the exit code
is not set and that is why the exit code assertion was failing. This
change adjusts the test to check the signal and if it is truthy, it
doesn't assert the exit code and instead logs the signal and continues
the rest of the assertions.

Refs: #58463 (comment)
Refs: #58199
Refs: #58463
Signed-off-by: Darshan Sen <raisinten@gmail.com>
PR-URL: #58478
Reviewed-By: Gerhard Stöbich <deb2001-github@yahoo.de>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: RaisinTen

test/async-hooks/test-emit-after-on-destroyed.js

@@ -52,8 +52,12 @@ if (process.argv[2] === 'child') {
   child.stderr.on('data', (d) => { errData = Buffer.concat([ errData, d ]); });
   child.stdout.on('data', (d) => { outData = Buffer.concat([ outData, d ]); });
 
-  child.on('close', common.mustCall((code) => {
-    assert.strictEqual(code, 1);
+  child.on('close', common.mustCall((code, signal) => {
+    if (signal) {
+      console.log(`Child closed with signal: ${signal}`);
+    } else {
+      assert.strictEqual(code, 1);
+    }
     assert.match(outData.toString(), heartbeatMsg,
                  'did not crash until we reached offending line of code ' +
                  `(found ${outData})`);

test/async-hooks/test-improper-unwind.js

@@ -55,8 +55,12 @@ if (process.argv[2] === 'child') {
   child.stderr.on('data', (d) => { errData = Buffer.concat([ errData, d ]); });
   child.stdout.on('data', (d) => { outData = Buffer.concat([ outData, d ]); });
 
-  child.on('close', common.mustCall((code) => {
-    assert.strictEqual(code, 1);
+  child.on('close', common.mustCall((code, signal) => {
+    if (signal) {
+      console.log(`Child closed with signal: ${signal}`);
+    } else {
+      assert.strictEqual(code, 1);
+    }
     assert.match(outData.toString(), heartbeatMsg,
                  'did not crash until we reached offending line of code ' +
                  `(found ${outData})`);