Recipes: make cwd default to slave_build

scripts/slave/recipes/v8.expected/full_client_dart_fyi_v8_mac_release.json

Index: scripts/slave/recipes/v8.expected/full_client_dart_fyi_v8_mac_release.json
diff --git a/scripts/slave/recipes/v8.expected/full_client_dart_fyi_v8_mac_release.json b/scripts/slave/recipes/v8.expected/full_client_dart_fyi_v8_mac_release.json
index 7909b09d81eebfc7a80754f7ccb5e47af5d80fe3..2aba1ff57b28bcc2e5670a10a610aae430aad1fd 100644
--- a/scripts/slave/recipes/v8.expected/full_client_dart_fyi_v8_mac_release.json
+++ b/scripts/slave/recipes/v8.expected/full_client_dart_fyi_v8_mac_release.json
@@ -24,6 +24,7 @@
       "--output_manifest",
       "--with_branch_heads"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "bot_update",
     "~followup_annotations": [
       "@@@STEP_TEXT@Some step text@@@",
@@ -56,6 +57,7 @@
       "[DEPOT_TOOLS]/gclient.py",
       "runhooks"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "env": {
       "GYP_DEFINES": "clang=1 gomadir='[BUILD]/goma' target_arch=ia32 use_goma=1 v8_enable_disassembler=1 v8_target_arch=ia32",
       "GYP_GENERATORS": "ninja"
@@ -68,6 +70,7 @@
       "-u",
       "[BUILD]/scripts/slave/cleanup_temp.py"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "cleanup_temp"
   },
   {
@@ -87,6 +90,7 @@
       "[BUILD]/goma",
       "--"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "compile"
   },
   {
@@ -106,6 +110,7 @@
       "--build-properties",
       "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"branch\": \"4.2\", \"buildername\": \"v8-mac-release\", \"buildnumber\": 571, \"mastername\": \"client.dart.fyi\", \"parent_buildername\": null, \"recipe\": \"v8\", \"revision\": \"20123\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "package build"
   }
 ]