test: add platform timeout support for riscv64

PR-URL: #54591
Refs: #54499
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>

test/common/index.js

@@ -143,6 +143,7 @@ const isOpenBSD = process.platform === 'openbsd';
 const isLinux = process.platform === 'linux';
 const isMacOS = process.platform === 'darwin';
 const isASan = process.config.variables.asan === 1;
+const isRiscv64 = process.arch === 'riscv64';
 const isDebug = process.features.debug;
 const isPi = (() => {
   try {
@@ -290,6 +291,10 @@ function platformTimeout(ms) {
   if (isPi)
     return multipliers.two * ms;  // Raspberry Pi devices
 
+  if (isRiscv64) {
+    return multipliers.four * ms;
+  }
+
   return ms;
 }