Converted the tryserver.chromium.linux asan builder to a recipe.

scripts/slave/recipe_modules/chromium/builders.py

Index: scripts/slave/recipe_modules/chromium/builders.py
diff --git a/scripts/slave/recipe_modules/chromium/builders.py b/scripts/slave/recipe_modules/chromium/builders.py
index 2599233fa4ae055f8af160f8c0c3e0ce72e61835..512dbc3c5d804f71238551aa8029ee9281585624 100644
--- a/scripts/slave/recipe_modules/chromium/builders.py
+++ b/scripts/slave/recipe_modules/chromium/builders.py
@@ -14,6 +14,7 @@ from . import chromium_webkit
 from . import chromium_win
 from . import client_skia
 from . import client_v8
+from . import tryserver_chromium_linux
 from . import tryserver_chromium_mac
 
 
@@ -30,5 +31,6 @@ BUILDERS = {
   'chromium.win': chromium_win.SPEC,
   'client.skia': client_skia.SPEC,
   'client.v8': client_v8.SPEC,
+  'tryserver.chromium.linux': tryserver_chromium_linux.SPEC,
   'tryserver.chromium.mac': tryserver_chromium_mac.SPEC,
 }