MB: Add symbol_level=2 to new Win ASan bot.

tools-webrtc/mb/mb_config.pyl

Index: tools-webrtc/mb/mb_config.pyl
diff --git a/tools-webrtc/mb/mb_config.pyl b/tools-webrtc/mb/mb_config.pyl
index c30aa24f65cdc3e20ad4aad3f6736faf79ce918b..aecd95b01d4634f6220fa928118d18d75769fd66 100644
--- a/tools-webrtc/mb/mb_config.pyl
+++ b/tools-webrtc/mb/mb_config.pyl
@@ -257,7 +257,7 @@
       'gn', 'clang', 'openh264_release_bot', 'x64',
     ],
     'win_asan_clang_release_bot_x86': [
-      'gn', 'asan', 'clang', 'openh264_release_bot', 'x86',
+      'gn', 'asan', 'clang',  'full_symbols', 'openh264_release_bot', 'x86',
     ],
     'win_syzyasan_release_bot_x86': [
       'gn', 'syzyasan', 'minimal_symbols', 'openh264_release_bot', 'x86',
@@ -364,6 +364,10 @@
       'gn_args': 'error',
     },
 
+    'full_symbols': {
+      'gn_args': 'symbol_level=2',
+    },
+
     'gcc': {
       'gn_args': 'is_clang=false use_sysroot=false',
     },