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

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https://hg.mozilla.org/integration/gaia-central/rev/7ee9a4eb33ad
Author: steveck-chung <schung@mozilla.com>
Desc: Merge pull request #19650 from azasypkin/bug-1013295-invalid-timestamp

Bug 1013295 - [Messages] Migrated messages do not have a proper sentTimestamp. Hiding label with invalid timestamp. r=schung

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https://hg.mozilla.org/integration/gaia-central/rev/4139d6a3c70b
Author: Aleh Zasypkin <azasypkin@mozilla.com>
Desc: Bug 1013295 - [Messages] Migrated messages do not have a proper sentTimestamp. Hiding label with invalid timestamp. r=schung

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https://hg.mozilla.org/integration/gaia-central/rev/8ad884da26d0
Author: gasolin <gasolin@gmail.com>
Desc: Merge pull request #19696 from gasolin/issue-1011611m

Bug 1011611 - disable share button before the activity is complete, r=dale

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https://hg.mozilla.org/integration/gaia-central/rev/04155cbb7ebe
Author: gasolin <gasolin@gmail.com>
Desc: Bug 1011611 - disable share button before the activity is complete

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "b788acc2ea61ba9d2155a3540cff574d030efb96", 
+    "revision": "7ee9a4eb33ad1ddd3d0808d08b40e12672dac993", 
     "repo_path": "/integration/gaia-central"
 }