Add WebKit Linux Trusty (dbg) to config/builders.py.

third_party/WebKit/Tools/Scripts/webkitpy/common/config/builders.py

 # Copyright (c) 2016, Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 25 matching lines @@
         "specifiers": ['Win7', 'Debug']
     },
     "WebKit Win10": {
         "port_name": "win-win10",
         "specifiers": ['Win10', 'Release']
     },
     "WebKit Linux Trusty": {
         "port_name": "linux-trusty",
         "specifiers": ['Trusty', 'Release']
     },
+    "WebKit Linux Trusty (dbg)": {
+        "port_name": "linux-trusty",
+        "specifiers": ['Trusty', 'Debug']
+    },
     "WebKit Mac10.9": {
         "port_name": "mac-mac10.9",
         "specifiers": ['Mac10.9', 'Release']
     },
     "WebKit Mac10.10": {
         "port_name": "mac-mac10.10",
         "specifiers": ['Mac10.10', 'Release']
     },
     "WebKit Mac10.11": {
         "port_name": "mac-mac10.11",
@@ skipping 45 matching lines @@
         "port_name": "win-win10",
         "specifiers": ['Win10', 'Release'],
         "is_try_builder": True,
     },
     "android_blink_rel": {
         "port_name": "android",
         "specifiers": ['Android', 'Release'],
         "is_try_builder": True,
     },
 }