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

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https://hg.mozilla.org/integration/gaia-central/rev/7cab6b8d6247
Author: Johan Lorenzo <jlorenzo@mozilla.com>
Desc: Merge pull request #31129 from mozilla-b2g/bug-1183710

Bug 1183710 - Disable test_dialer.py

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https://hg.mozilla.org/integration/gaia-central/rev/58a84b2ed192
Author: Johan Lorenzo <jlorenzo@mozilla.com>
Desc: Bug 1183710 - Disable test_dialer.py

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https://hg.mozilla.org/integration/gaia-central/rev/5e7847db5683
Author: Martijn <martijn.martijn@gmail.com>
Desc: Merge pull request #31114 from mwargers/1187945

Bug 1187945 - Intermittent failure in test_dialer_add_contact.py in self.wait_for_done(return_contacts), NoSuchWindowException

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https://hg.mozilla.org/integration/gaia-central/rev/0e12ddb8382b
Author: Martijn Wargers <mwargers@mozilla.com>
Desc: Bug 1187945 - Intermittent failure in test_dialer_add_contact.py in self.wait_for_done(return_contacts), NoSuchWindowException

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "a576c2f32d54f0e65c003a31146e661d9993fdb7", 
+        "git_revision": "ba33139c251108308cf882c152d9a7fff001bb83", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "c198d55fd24a7745d77da5f33ec95a936b37c239", 
+    "revision": "7cab6b8d624734fe3680a207ecf46f583e93ac24", 
     "repo_path": "integration/gaia-central"
 }