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

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https://hg.mozilla.org/integration/gaia-central/rev/e14b96359ad5
Author: autolander <bug.autolander@gmail.com>
Desc: Bug 1107781 - merge pull request #29480 from gabrielesvelto:bug-1107781-call-log-machete-attack to mozilla-b2g:master

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https://hg.mozilla.org/integration/gaia-central/rev/ca7ccdb5dd96
Author: Gabriele Svelto <gsvelto@mozilla.com>
Desc: Bug 1107781 - Remove the unused dialerRecents store and all associated code, adjust the unit-tests accordingly r=drs

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https://hg.mozilla.org/integration/gaia-central/rev/f92271d89db5
Author: Gabriele Svelto <gsvelto@mozilla.com>
Desc: Bug 1107781 - Remove the upgrade procedure from versions 1 to 5 of the call log database r=drs

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https://hg.mozilla.org/integration/gaia-central/rev/798342d14735
Author: Gabriele Svelto <gsvelto@mozilla.com>
Desc: Bug 1107781 - Upgrade the dialer reference workloads to the database version 5 r=jhylands

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "36f7977a13a9b3b42de25af5fa69c115c5d68bfb", 
+        "git_revision": "b9667acfc50a7596346947b946f63a2351bfaf35", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "40ca17275a6be35a452ff822a43f33af27998040", 
+    "revision": "e14b96359ad53d0029f42476c19334a95677dbf0", 
     "repo_path": "integration/gaia-central"
 }