Bumping gaia.json for 2 gaia-central revision(s)

========

https://hg.mozilla.org/integration/gaia-central/rev/4d93929ed24d
Author: Fernando Campo <fernando.campo@o2.com>
Desc: Merge pull request #11075 from fcampo/2error-sendingSms

Bug 891855 - [sms][mms] Gaia should handle the error codes properly to pop up reasonable prompt (r=gene, pike)

========

https://hg.mozilla.org/integration/gaia-central/rev/f682e2b99986
Author: Fernando Campo <fernando.campo@o2.com>
Desc: Bug 891855 - [sms][mms] Gaia should handle the error codes properly to pop up reasonable prompt