Adding ecmascript simd tests to v8 buildbots and trybots.

scripts/slave/recipes/v8.expected/full_client_v8_V8_Linux___debug___nosse4.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/bot_update.py",
       "--master",
       "client.v8",
       "--builder",
       "V8 Linux - debug - nosse4",
@@ skipping 275 matching lines @@
       "@@@STEP_LOG_LINE@durations@Test: mjsunit/Cool.Test@@@",
       "@@@STEP_LOG_LINE@durations@Flags: -f@@@",
       "@@@STEP_LOG_LINE@durations@Command: d8 -f mjsunit/Cool.Test@@@",
       "@@@STEP_LOG_LINE@durations@Duration: 01:01:002@@@",
       "@@@STEP_LOG_LINE@durations@Test: mjsunit/Cool.Test2@@@",
       "@@@STEP_LOG_LINE@durations@Flags: -f -g@@@",
       "@@@STEP_LOG_LINE@durations@Command: d8 -f mjsunit/Cool.Test2@@@",
       "@@@STEP_LOG_LINE@durations@Duration: 00:00:101@@@",
       "@@@STEP_LOG_END@durations@@@"
     ]
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "RECIPE_MODULE[v8]/resources/v8testing.py",
+      "--target",
+      "Debug",
+      "--arch",
+      "ia32",
+      "--outdir",
+      "out",
+      "--testname",
+      "simdjs/shell_test_runner",
+      "--shell_flags=\"--noenable-sse4-1 --noenable-avx\"",
+      "--json-test-results",
+      "/path/to/tmp/json"
+    ],
+    "cwd": "[SLAVE_BUILD]/v8",
+    "name": "SimdJs - small",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@durations@01:01:002 mjsunit/Cool.Test@@@",
+      "@@@STEP_LOG_LINE@durations@00:00:101 mjsunit/Cool.Test2@@@",
+      "@@@STEP_LOG_LINE@durations@@@@",
+      "@@@STEP_LOG_LINE@durations@Details:@@@",
+      "@@@STEP_LOG_LINE@durations@@@@",
+      "@@@STEP_LOG_LINE@durations@Test: mjsunit/Cool.Test@@@",
+      "@@@STEP_LOG_LINE@durations@Flags: -f@@@",
+      "@@@STEP_LOG_LINE@durations@Command: d8 -f mjsunit/Cool.Test@@@",
+      "@@@STEP_LOG_LINE@durations@Duration: 01:01:002@@@",
+      "@@@STEP_LOG_LINE@durations@Test: mjsunit/Cool.Test2@@@",
+      "@@@STEP_LOG_LINE@durations@Flags: -f -g@@@",
+      "@@@STEP_LOG_LINE@durations@Command: d8 -f mjsunit/Cool.Test2@@@",
+      "@@@STEP_LOG_LINE@durations@Duration: 00:00:101@@@",
+      "@@@STEP_LOG_END@durations@@@"
+    ]
   }
 ]