Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/6ef6c08b5562
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Revert "Merge pull request #31434 from justindarc/bug1196425"

This reverts commit ccddf1824ac6da0ebb4b4433dbfd6dd21cbf7aca, reversing
changes made to 7a77326ef8b14ddef4d101efc336d7b26670ef94.

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https://hg.mozilla.org/integration/gaia-central/rev/3b10699e3327
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Revert "Merge pull request #31457 from justindarc/bug1196414"

This reverts commit c74e69d85e0f6a18afe3fa27a8eeceae70a2ff18, reversing
changes made to 047ee93ad94a8c8bead484b984e2fc2195990847.

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https://hg.mozilla.org/integration/gaia-central/rev/520714742a54
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Revert "Merge pull request #31503 from justindarc/bug1197873"

This reverts commit d95dd48d64451062bdffaf1c5d1c619e4c0b0acc, reversing
changes made to 140dd50887f126e10441d617049ae96d561f8932.

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "1713fd6dc56503cc6ecf340189fad081e85fbe3b", 
+        "git_revision": "0275bfb88531a999a8b3553b544fa0613e52f9bd", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "ba1f69ef3546163ab45695a294f256c255f24235", 
+    "revision": "6ef6c08b55629f4be0f2d9e605c362c8de528d4e", 
     "repo_path": "integration/gaia-central"
 }