test: skip test-hash-seed on armv6 and armv7

The test is too slow to run on the Raspberry Pi bots. (It takes over 900
seconds to run on Pi 3 bots and even more than that on Pi 2 bots.) Skip
it on armv6 and armv7.

Refs: #34289

PR-URL: #34289
Reviewed-By: Richard Lau <rlau@redhat.com>

test/pummel/test-hash-seed.js

@@ -2,6 +2,11 @@
 
 // Check that spawn child doesn't create duplicated entries
 const common = require('../common');
+
+if ((process.config.variables.arm_version === '6') ||
+    (process.config.variables.arm_version === '7'))
+  common.skip('Too slow for armv6 and armv7 bots');
+
 const kRepetitions = 2;
 const assert = require('assert');
 const fixtures = require('../common/fixtures');