Use always_run v can_fail_build

scripts/slave/recipes/chromium.expected/basic_mac_32.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "[DEPOT_TOOLS_ROOT]/gclient.py",
       "config",
       "--spec",
       "cache_dir = '[ROOT]/git_cache'\nsolutions = [{'custom_deps': {'src/third_party/WebKit/LayoutTests': None, 'src/webkit/data/layout_tests/LayoutTests': None}, 'custom_vars': {'googlecode_url': 'svn://svn-mirror.golo.chromium.org/%s', 'nacl_trunk': 'svn://svn-mirror.golo.chromium.org/native_client/trunk', 'sourceforge_url': 'svn://svn-mirror.golo.chromium.org/%(repo)s', 'webkit_trunk': 'svn://svn-mirror.golo.chromium.org/blink/trunk'}, 'deps_file': '.DEPS.git', 'managed': True, 'name': 'src', 'url': 'https://chromium.googlesource.com/chromium/src.git'}]"
     ],
@@ skipping 58 matching lines @@
       "[DEPOT_TOOLS_ROOT]/gclient.py",
       "runhooks"
     ],
     "env": {
       "GYP_DEFINES": "component=static_library",
       "GYP_GENERATORS": "ninja"
     },
     "name": "gclient runhooks"
   },
   {
+    "abort_on_failure": true,
     "cmd": [
       "python",
       "-u",
       "[BUILD_ROOT]/scripts/slave/compile.py",
       "--target",
       "Release",
       "--build-dir",
       "[SLAVE_BUILD_ROOT]/src/out",
       "--src-dir",
       "[SLAVE_BUILD_ROOT]/src",
       "--build-tool",
       "ninja",
       "--compiler",
       "goma",
       "--",
       "All",
       "chromium_builder_tests"
     ],
     "name": "compile"
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "print \"last step\""
+    ],
+    "name": "last step",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@python.inline@print \"last step\"@@@",
+      "@@@STEP_LOG_END@python.inline@@@"
+    ]
   }
 ]