Add counting the number of CPU's in goma module

scripts/slave/recipe_modules/goma/example.expected/mac.json

Index: scripts/slave/recipe_modules/goma/example.expected/mac.json
diff --git a/scripts/slave/recipe_modules/goma/example.expected/mac.json b/scripts/slave/recipe_modules/goma/example.expected/mac.json
index 2fc017d518a9aebd6a17c9d7310fc23b32a4c1c0..93ea12970241754f4a7fad1252234114493eee27 100644
--- a/scripts/slave/recipe_modules/goma/example.expected/mac.json
+++ b/scripts/slave/recipe_modules/goma/example.expected/mac.json
@@ -61,6 +61,35 @@
     "cmd": [
       "python",
       "-u",
+      "\nimport multiprocessing\n\ntry:\n  jobs = min(200, multiprocessing.cpu_count() * 10)\nexcept NotImplementedError:\n  jobs = 50\n\nprint jobs\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@@@@",
+      "@@@STEP_LOG_LINE@python.inline@try:@@@",
+      "@@@STEP_LOG_LINE@python.inline@  jobs = min(200, multiprocessing.cpu_count() * 10)@@@",
+      "@@@STEP_LOG_LINE@python.inline@except NotImplementedError:@@@",
+      "@@@STEP_LOG_LINE@python.inline@  jobs = 50@@@",
+      "@@@STEP_LOG_LINE@python.inline@@@@",
+      "@@@STEP_LOG_LINE@python.inline@print jobs@@@",
+      "@@@STEP_LOG_END@python.inline@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "echo",
+      "50"
+    ],
+    "name": "echo"
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
       "[CACHE]/cipd/goma/goma_ctl.py",
       "restart"
     ],
@@ -86,6 +115,13 @@
   },
   {
     "cmd": [
+      "echo",
+      "50"
+    ],
+    "name": "echo goma jobs"
+  },
+  {
+    "cmd": [
       "python",
       "-u",
       "[CACHE]/cipd/goma/goma_ctl.py",