Bumping gaia.json for 5 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/87a6dd5b96f9
Author: Mason Chang <mchang@mozilla.com>
Desc: Revert "Merge pull request #16500 from changm/bug960325"

This reverts commit 7540b00be89b65b180817564dfb4b8a0701179ca, reversing
changes made to 447eb65ee5a7428e3959ac3b1c0a3fbbfc125d43.

========

https://hg.mozilla.org/integration/gaia-central/rev/c905f06add76
Author: Mason Chang <mchang@mozilla.com>
Desc: Revert "Merge pull request #16640 from changm/bug970284"

This reverts commit ec159aac19ff25912f1d68ffb44b29f797583ef5, reversing
changes made to 5534725dbc8245070cd8c40bd4150cfaef306474.

========

https://hg.mozilla.org/integration/gaia-central/rev/c0a866c5a1ca
Author: KWierso <kwierso@gmail.com>
Desc: Merge branch 'master' of github.com:mozilla-b2g/gaia

========

https://hg.mozilla.org/integration/gaia-central/rev/562a5b7c0c98
Author: KWierso <kwierso@gmail.com>
Desc: Remove broken test until rik has a chance to investigate in bug 969280 r=rik

========

https://hg.mozilla.org/integration/gaia-central/rev/217af7a629e7
Author: KWierso <kwierso@gmail.com>
Desc: Reland "Merge pull request #16656 from Rik/telephony-promise-969280"

This reverts commit 548965a5866aa38b5f44c336b3a7fb723164e277.

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "branch": "", 
         "revision": ""
     }, 
-    "revision": "da335c064a2412872277bbe4ca902a2dc8d66c95", 
+    "revision": "87a6dd5b96f96800288c56c9c10e1763c145a886", 
     "repo_path": "/integration/gaia-central"
 }