Add counting the number of CPU's in goma module

scripts/slave/recipes/mojo.expected/mojo_linux.json

Index: scripts/slave/recipes/mojo.expected/mojo_linux.json
diff --git a/scripts/slave/recipes/mojo.expected/mojo_linux.json b/scripts/slave/recipes/mojo.expected/mojo_linux.json
index 0f023fe67279b5b7e7b4076758102c0bff94b758..589a9f046080ffb2cff2556083b0d2e6232b939f 100644
--- a/scripts/slave/recipes/mojo.expected/mojo_linux.json
+++ b/scripts/slave/recipes/mojo.expected/mojo_linux.json
@@ -121,6 +121,22 @@
     "cmd": [
       "python",
       "-u",
+      "\nimport multiprocessing\nprint min(200, multiprocessing.cpu_count() * 10)\n"
+    ],
+    "name": "ensure_goma.get the number of cpus",
+    "stdout": "/path/to/tmp/",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LOG_LINE@python.inline@@@@",
+      "@@@STEP_LOG_LINE@python.inline@import multiprocessing@@@",
+      "@@@STEP_LOG_LINE@python.inline@print min(200, multiprocessing.cpu_count() * 10)@@@",
+      "@@@STEP_LOG_END@python.inline@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
       "[SLAVE_BUILD]/src/mojo/tools/mojob.py",
       "gn",
       "--release"