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

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https://hg.mozilla.org/integration/gaia-central/rev/81d42d0e1770
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Merge pull request #33592 from arcturus/bug-1219643

Bug 1219643 - Implement *test_delete_contact.py* as an integration te…

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https://hg.mozilla.org/integration/gaia-central/rev/531456176bc2
Author: Francisco Jordano <fjordano@mozilla.com>
Desc: Bug 1219643 - Implement *test_delete_contact.py* as an integration test in JavaScript

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https://hg.mozilla.org/integration/gaia-central/rev/6b619e074f9e
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Merge pull request #33593 from arcturus/bug-1219645

Bug 1219645 - Implement *test_export_contacts_to_sdcard.py* as an int…

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https://hg.mozilla.org/integration/gaia-central/rev/6d3bf918dbe6
Author: Francisco Jordano <fjordano@mozilla.com>
Desc: Bug 1219645 - Implement *test_export_contacts_to_sdcard.py* as an integration test in JavaScript

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "3f04cb73f41a61f932b8e87474c29d214f6d89a2", 
+        "git_revision": "fd046f6db0af510aa268f4f14a9580056fba6fc4", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "4e1257b8e7447617fb62e91ff304530881ae3b31", 
+    "revision": "81d42d0e1770f093e772fd33731420874f806075", 
     "repo_path": "integration/gaia-central"
 }