Recipes: make cwd default to slave_build

scripts/slave/recipes/chromium_trybot_legacy.expected/full_tryserver_chromium_linux_linux_chromium_asan_rel.json

Index: scripts/slave/recipes/chromium_trybot_legacy.expected/full_tryserver_chromium_linux_linux_chromium_asan_rel.json
diff --git a/scripts/slave/recipes/chromium_trybot_legacy.expected/full_tryserver_chromium_linux_linux_chromium_asan_rel.json b/scripts/slave/recipes/chromium_trybot_legacy.expected/full_tryserver_chromium_linux_linux_chromium_asan_rel.json
index 98c13f56e5a569e302f9e5eac83d84182b23728f..f6455fb96504102d1b24ba7a253c395ef83d19bd 100644
--- a/scripts/slave/recipes/chromium_trybot_legacy.expected/full_tryserver_chromium_linux_linux_chromium_asan_rel.json
+++ b/scripts/slave/recipes/chromium_trybot_legacy.expected/full_tryserver_chromium_linux_linux_chromium_asan_rel.json
@@ -28,6 +28,7 @@
       "src@HEAD",
       "--force"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "bot_update",
     "~followup_annotations": [
       "@@@STEP_TEXT@Some step text@@@",
@@ -75,6 +76,7 @@
       "[SLAVE_BUILD]/src/testing/buildbot/chromium_memory_trybot.json",
       "/path/to/tmp/json"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "read test spec",
     "~followup_annotations": [
       "@@@STEP_TEXT@path: testing/buildbot/chromium_memory_trybot.json@@@",
@@ -126,6 +128,7 @@
       "--properties",
       "{\"buildername\": \"linux_chromium_asan_rel\", \"buildnumber\": 571, \"mastername\": \"tryserver.chromium.linux\", \"slavename\": \"TestSlavename\", \"target_platform\": \"linux\"}"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "get compile targets for scripts",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{}@@@",
@@ -139,6 +142,7 @@
       "[DEPOT_TOOLS]/gclient.py",
       "runhooks"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "env": {
       "GYP_DEFINES": "asan=1 clang=1 component=static_library dcheck_always_on=1 fastbuild=1 gomadir='[BUILD]/goma' lsan=1 target_arch=x64 use_goma=1"
     },
@@ -164,6 +168,7 @@
       "browser_tests",
       "mojo_common_unittests"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "compile (with patch)"
   },
   {
@@ -192,6 +197,7 @@
       "--test-launcher-print-test-stdio=always",
       "--test-launcher-batch-limit=1"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "base_unittests (with patch)"
   },
   {
@@ -220,6 +226,7 @@
       "--test-launcher-print-test-stdio=always",
       "--test-launcher-batch-limit=1"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "mojo_common_unittests (with patch)"
   },
   {
@@ -248,6 +255,7 @@
       "--test-launcher-print-test-stdio=always",
       "--test-launcher-batch-limit=1"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "browser_tests (with patch)"
   },
   {
@@ -265,6 +273,7 @@
       "--output",
       "/path/to/tmp/json"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "nacl_integration (with patch)",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{@@@",