Recipes: make cwd default to slave_build

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

Index: scripts/slave/recipes/chromium.expected/full_chromium_chrome_Google_Chrome_Win.json
diff --git a/scripts/slave/recipes/chromium.expected/full_chromium_chrome_Google_Chrome_Win.json b/scripts/slave/recipes/chromium.expected/full_chromium_chrome_Google_Chrome_Win.json
index 000da89412b33166f143ad3e1273137301b003f0..b9774f56f1f2715cb91bb7568ef1b869730ba676 100644
--- a/scripts/slave/recipes/chromium.expected/full_chromium_chrome_Google_Chrome_Win.json
+++ b/scripts/slave/recipes/chromium.expected/full_chromium_chrome_Google_Chrome_Win.json
@@ -5,6 +5,7 @@
       "-u",
       "[BUILD]\\scripts\\slave\\kill_processes.py"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "taskkill"
   },
   {
@@ -29,6 +30,7 @@
       "--revision",
       "src@HEAD"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "bot_update",
     "~followup_annotations": [
       "@@@STEP_TEXT@Some step text@@@",
@@ -75,6 +77,7 @@
       "[DEPOT_TOOLS]\\gclient.py",
       "runhooks"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "env": {
       "GYP_DEFINES": "branding=Chrome buildtype=Official chromium_win_pch=0 component=static_library fastbuild=1 gomadir='[BUILD]\\goma' target_arch=ia32 use_goma=1"
     },
@@ -88,6 +91,7 @@
       "[SLAVE_BUILD]\\src\\testing\\buildbot\\chromium.chrome.json",
       "/path/to/tmp/json"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "read test spec",
     "~followup_annotations": [
       "@@@STEP_TEXT@path: [SLAVE_BUILD]\\src\\testing\\buildbot\\chromium.chrome.json@@@",
@@ -110,6 +114,7 @@
       "--properties",
       "{\"buildername\": \"Google Chrome Win\", \"buildnumber\": 571, \"mastername\": \"chromium.chrome\", \"slavename\": \"TestSlavename\", \"target_platform\": \"win\"}"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "get compile targets for scripts",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{}@@@",
@@ -122,6 +127,7 @@
       "-u",
       "[BUILD]\\scripts\\slave\\cleanup_temp.py"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "cleanup_temp"
   },
   {
@@ -145,6 +151,7 @@
       "--",
       "chrome_official_builder"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "compile"
   }
 ]