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

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https://hg.mozilla.org/integration/gaia-central/rev/8cf33ac3c34f
Author: Tilman Kamp <tkamp@mozilla.com>
Desc: Merge pull request #33743 from tilmankamp/fix-1224138

Bug 1224138 - Made buttons darker for filtered card view R=mhenretty

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https://hg.mozilla.org/integration/gaia-central/rev/4d63977a90cf
Author: Tilman Kamp <tilman@dreamandmatter.com>
Desc: Bug 1224138 - Added darkening (50%) CSS-filter to (inactive) buttons in filtered card view R=tilman

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "331904676bd17bf3eba2b9448589cf0c34359e27", 
+        "git_revision": "5ad4752a041f327952f9b693c8b9e95249e48acb", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "91557dcc568536e1653ad90e18b5c62d169b93ae", 
+    "revision": "8cf33ac3c34f073b58dd65497e5279495d655298", 
     "repo_path": "integration/gaia-central"
 }