test: mark test-crypto-timing-safe-equal-benchmarks flaky

PR-URL: #40065
Refs: #38226
Reviewed-By: Ash Cripps <acripps@redhat.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Michael Dawson <midawson@redhat.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>

test/pummel/pummel.status

@@ -0,0 +1,25 @@
+prefix pummel
+
+# To mark a test as flaky, list the test name in the appropriate section
+# below, without ".js", followed by ": PASS,FLAKY". Example:
+# sample-test                        : PASS,FLAKY
+
+[true] # This section applies to all platforms
+
+[$system==win32]
+
+[$system==linux]
+# https://github.com/nodejs/node/issues/38226
+test-crypto-timing-safe-equal-benchmarks: PASS,FLAKY
+
+[$system==macos]
+
+[$arch==arm || $arch==arm64]
+
+[$system==solaris] # Also applies to SmartOS
+
+[$system==freebsd]
+
+[$system==aix]
+
+[$system==ibmi]