Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/f19f2033c2d1
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Merge pull request #23921 from davidflanagan/bug1064126

Bug 1064126: be more efficient with canvas memory r=russn

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https://hg.mozilla.org/integration/gaia-central/rev/9b7eb2532973
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Bug 1064126: be more efficient with canvas memory

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "db96ee72512f58c39399179e73465955f3a0bddd", 
+    "revision": "f19f2033c2d1547e1aed7d9e778da7f4db7f6806", 
     "repo_path": "/integration/gaia-central"
 }