webrtc: use correct cwd for running tests

scripts/slave/recipes/webrtc/standalone.expected/client_webrtc_linux_asan.json

Index: scripts/slave/recipes/webrtc/standalone.expected/client_webrtc_linux_asan.json
diff --git a/scripts/slave/recipes/webrtc/standalone.expected/client_webrtc_linux_asan.json b/scripts/slave/recipes/webrtc/standalone.expected/client_webrtc_linux_asan.json
index eb10c22de37fa632b04739d86372dd53f6346913..a13ee003de911e8ed98f521cecaf7b4be51e3148 100644
--- a/scripts/slave/recipes/webrtc/standalone.expected/client_webrtc_linux_asan.json
+++ b/scripts/slave/recipes/webrtc/standalone.expected/client_webrtc_linux_asan.json
@@ -278,6 +278,7 @@
       "[BUILDER_CACHE]/Linux_Asan/src/out/Release/audio_decoder_unittests",
       "--"
     ],
+    "cwd": "[BUILDER_CACHE]/Linux_Asan",
     "name": "audio_decoder_unittests"
   },
   {
@@ -305,6 +306,7 @@
       "[BUILDER_CACHE]/Linux_Asan/src/out/Release/common_audio_unittests",
       "--"
     ],
+    "cwd": "[BUILDER_CACHE]/Linux_Asan",
     "name": "common_audio_unittests"
   },
   {
@@ -332,6 +334,7 @@
       "[BUILDER_CACHE]/Linux_Asan/src/out/Release/common_video_unittests",
       "--"
     ],
+    "cwd": "[BUILDER_CACHE]/Linux_Asan",
     "name": "common_video_unittests"
   },
   {
@@ -359,6 +362,7 @@
       "[BUILDER_CACHE]/Linux_Asan/src/out/Release/modules_tests",
       "--"
     ],
+    "cwd": "[BUILDER_CACHE]/Linux_Asan",
     "name": "modules_tests"
   },
   {
@@ -386,6 +390,7 @@
       "[BUILDER_CACHE]/Linux_Asan/src/out/Release/modules_unittests",
       "--"
     ],
+    "cwd": "[BUILDER_CACHE]/Linux_Asan",
     "name": "modules_unittests"
   },
   {
@@ -413,6 +418,7 @@
       "[BUILDER_CACHE]/Linux_Asan/src/out/Release/peerconnection_unittests",
       "--"
     ],
+    "cwd": "[BUILDER_CACHE]/Linux_Asan",
     "name": "peerconnection_unittests"
   },
   {
@@ -440,6 +446,7 @@
       "[BUILDER_CACHE]/Linux_Asan/src/out/Release/rtc_media_unittests",
       "--"
     ],
+    "cwd": "[BUILDER_CACHE]/Linux_Asan",
     "name": "rtc_media_unittests"
   },
   {
@@ -467,6 +474,7 @@
       "[BUILDER_CACHE]/Linux_Asan/src/out/Release/rtc_pc_unittests",
       "--"
     ],
+    "cwd": "[BUILDER_CACHE]/Linux_Asan",
     "name": "rtc_pc_unittests"
   },
   {
@@ -494,6 +502,7 @@
       "[BUILDER_CACHE]/Linux_Asan/src/out/Release/rtc_unittests",
       "--"
     ],
+    "cwd": "[BUILDER_CACHE]/Linux_Asan",
     "name": "rtc_unittests"
   },
   {
@@ -521,6 +530,7 @@
       "[BUILDER_CACHE]/Linux_Asan/src/out/Release/system_wrappers_unittests",
       "--"
     ],
+    "cwd": "[BUILDER_CACHE]/Linux_Asan",
     "name": "system_wrappers_unittests"
   },
   {
@@ -548,6 +558,7 @@
       "[BUILDER_CACHE]/Linux_Asan/src/out/Release/test_support_unittests",
       "--"
     ],
+    "cwd": "[BUILDER_CACHE]/Linux_Asan",
     "name": "test_support_unittests"
   },
   {
@@ -575,6 +586,7 @@
       "[BUILDER_CACHE]/Linux_Asan/src/out/Release/tools_unittests",
       "--"
     ],
+    "cwd": "[BUILDER_CACHE]/Linux_Asan",
     "name": "tools_unittests"
   },
   {
@@ -602,6 +614,7 @@
       "[BUILDER_CACHE]/Linux_Asan/src/out/Release/video_engine_tests",
       "--"
     ],
+    "cwd": "[BUILDER_CACHE]/Linux_Asan",
     "name": "video_engine_tests"
   },
   {
@@ -629,6 +642,7 @@
       "[BUILDER_CACHE]/Linux_Asan/src/out/Release/voice_engine_unittests",
       "--"
     ],
+    "cwd": "[BUILDER_CACHE]/Linux_Asan",
     "name": "voice_engine_unittests"
   },
   {
@@ -656,6 +670,7 @@
       "[BUILDER_CACHE]/Linux_Asan/src/out/Release/xmllite_xmpp_unittests",
       "--"
     ],
+    "cwd": "[BUILDER_CACHE]/Linux_Asan",
     "name": "xmllite_xmpp_unittests"
   },
   {
@@ -685,6 +700,7 @@
       "--enable-lsan",
       "webrtc_nonparallel_tests"
     ],
+    "cwd": "[BUILDER_CACHE]/Linux_Asan",
     "name": "webrtc_nonparallel_tests"
   },
   {