Bumping gaia.json for 6 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/b44b9ada3666
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Merge pull request #32509 from mikehenrty/bug-1211953-tp-link

Bug 1211953 - Update tracking protection info link in settings and FT…

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https://hg.mozilla.org/integration/gaia-central/rev/2c20375bdd6a
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Bug 1211953 - Update tracking protection info link in settings and FTE pop up

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https://hg.mozilla.org/integration/gaia-central/rev/6d6ca49f8522
Author: No-Jun Park <npark@mozilla.com>
Desc: Merge pull request #32484 from npark-mozilla/1215315

Bug 1215315 - Imagecompare: accomodate 0\n output for mismatch result

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https://hg.mozilla.org/integration/gaia-central/rev/9cacbe77263c
Author: No-Jun Park <npark@mozilla.com>
Desc: Bug 1215315 - Imagecompare: accomodate 0\n output for mismatch result

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https://hg.mozilla.org/integration/gaia-central/rev/56883a53b1e1
Author: No-Jun Park <npark@mozilla.com>
Desc: Merge pull request #32481 from npark-mozilla/1213355

Bug 1213355 - GaiaHeader.go_back shows ElementNotVisibleException

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https://hg.mozilla.org/integration/gaia-central/rev/8c2c7336bc94
Author: No-Jun Park <npark@mozilla.com>
Desc: Bug 1213355 - GaiaHeader.go_back shows ElementNotVisibleException

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "a5814bc89fbb42ed93aafdb88dff43dae6ad3538", 
+        "git_revision": "9a9b544336d36d7f3778e10a910113a3dc5ce731", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "bcfe0fec020e2b97edbf6c05429a2e7421d90e4e", 
+    "revision": "b44b9ada3666411c65c0bc8e286a16b5bd0339d9", 
     "repo_path": "integration/gaia-central"
 }