Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/2f64eeaddcd8
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Bug 984718 - [keyboard refactor] Add test/unit/.jshintrc
Bumping manifests a=b2g-bump
Bug 960749 - Improve error messages when < and > are used in filenames. r=bsmedberg

* Unify OS_FILE_ILLEGAL_CHARACTERS
* Provide KNOWN_PATH_SEPARATORS in addition to FILE_PATH_SEPARATOR.
* Update nsExternalAppHandler to use KNOWN_PATH_SEPARATORS instead of
  FILE_PATH_SEPARATOR when removing path separators.
* Fix DownloadsIPC.jsm when compiling with MOZ_DEBUG (would throw on undefined download.id).
* Add test for stripping out illegal characters when downloading.
Merge m-c to fx-team.
Bug 969963 - Grey out PanelUI-popup items when a subview is opened. r=mconley
Bug 974024 - Add FHR recording of Telemetry Experiments activity; r=bsmedberg

--HG--
extra : rebase_source : 1e875e53da49c69194ee740898ff943d1801d1cf
Bug 984872 - Remove deprecated promise.js usage in Firefox for Desktop. r=mak
Bug 985623: Force url classifier clients to specify which tables to lookup, add a pref to skip hash completion checks (r=gcp)
Merge m-c to fx-team.
Bug 983675 - Intrinsify and inline TypeDescrIsArrayType, TypeDescrIsUnsizedArrayType, TypeDescrIsSizedArrayType, TypeDescrIsSimpleType, ObjectIsTypedObject. r=shu
Bug 984237 - Specify mime type in require.js. r=gozala
Bug 985257 - Add implementation for Path2D constructor that takes an SVG path string. r=roc
Backed out changeset e9c807b1e3d4 (bug 985257) for bustage.
Merge mozilla-central to mozilla-inbound
Bug 978338 - Update new tab site rendering for fixed ratio tile images [r=adw]
Fix the size, margins, title, borders of tiles to new spec.
Bug 983709 part 1 - Don't mark shift instructions as commutative. r=h4writer
Bug 983709 part 2 - Fix MBinaryInstruction to not override congruentTo. r=h4writer
Bug 984673 - Do not compress PBrowser::UpdateFrame. r=kats
Bug 983300 part 1.  Disallow Promise as a return type for legacy callers and enforce all overloads for a method either returning promises or not returning promises.  r=khuey
Bug 983300 part 2.  Introduce a GenericPromiseReturningBindingMethod for methods that return Promise return value.  r=khuey,bholley

This method effectively catches exceptions from GenericBindingMethod and converts them into rejected promises.  This handles calls to Promise-returning APIs from everything except Ion fast paths.