Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/cf768e670ffa
Author: Ghislain 'Aus' Lacroix <aus@noiseport.org>
Desc: Merge pull request #31182 from nullaus/bug1188813

Bug 1188813 - Add --verbose to node-gyp commands to help debug issue.…

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https://hg.mozilla.org/integration/gaia-central/rev/8804b52c2d3c
Author: Ghislain 'Aus' Lacroix <aus@mozilla.com>
Desc: bug 1188813 - Add --verbose to node-gyp commands to help debug issue. r=me

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https://hg.mozilla.org/integration/gaia-central/rev/73fe6e98eafe
Author: Ghislain 'Aus' Lacroix <aus@noiseport.org>
Desc: Merge pull request #31183 from nullaus/master

Revert "Merge pull request #31181 from nullaus/bug1174901"

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https://hg.mozilla.org/integration/gaia-central/rev/490abcd9dc34
Author: Ghislain 'Aus' Lacroix <aus@mozilla.com>
Desc: Revert "Merge pull request #31181 from nullaus/bug1174901"

This reverts commit f1daa7c9aa170fb171f2c7c300cbbba75d23d90d, reversing
changes made to 7e7e92fbeea90cad8bf6f494b1a73712f79178e8.

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "f1daa7c9aa170fb171f2c7c300cbbba75d23d90d", 
+        "git_revision": "5a4cd0f44aa1edb2d04e7de2649ab7b632654d78", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "9a1733ef982afc43c8bd56d97ead401a7d60d47d", 
+    "revision": "cf768e670ffacd90b71efa5b449a85b52f31d4df", 
     "repo_path": "integration/gaia-central"
 }