Convert CFI Linux buildbot to MB (recipes part)

scripts/slave/recipes/chromium.expected/full_chromium_fyi_CFI_Linux.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/bot_update.py",
       "--master",
       "chromium.fyi",
       "--builder",
       "CFI Linux",
@@ skipping 79 matching lines @@
   },
   {
     "cmd": [
       "python",
       "-u",
       "[DEPOT_TOOLS]/gclient.py",
       "runhooks"
     ],
     "cwd": "[SLAVE_BUILD]",
     "env": {
+      "GYP_CHROMIUM_NO_ACTION": "1",
       "GYP_DEFINES": "cfi_vptr=1 clang=1 component=static_library target_arch=x64",
       "GYP_LINK_CONCURRENCY": "8"
     },
     "name": "gclient runhooks"
   },
   {
     "cmd": [
       "python",
       "-u",
       "\nimport shutil\nimport sys\nshutil.copy(sys.argv[1], sys.argv[2])\n",
@@ skipping 42 matching lines @@
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/cleanup_temp.py"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "cleanup_temp"
   },
   {
+    "cmd": [
+      "python",
+          "-u",
+          "[SLAVE_BUILD]/src/tools/mb/mb.py",
+          "gen",
+          "-m",
+          "chromium.fyi",
+          "-b",
+          "CFI Linux",
+          "--config-file",
+          "[SLAVE_BUILD]/src/tools/mb/mb_config.pyl",
+          "--goma-dir",
+          "[BUILD]/goma",
+          "//out/Release"
+    ],
+    "cwd": "[SLAVE_BUILD]",
+    "name": "generate_build_files"
+  },
+  {
     "allow_subannotations": true,
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/clang_revision.py",
       "--src-dir",
       "[SLAVE_BUILD]/src",
       "--output-json",
       "/path/to/tmp/json"
     ],
@@ skipping 24 matching lines @@
       "chromium_builder_tests"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "compile"
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
-]
+]