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

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https://hg.mozilla.org/integration/gaia-central/rev/dacd735009f9
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Merge pull request #14213 from Rik/change-reporter-944279

Bug 944279 - Use the spec reporter for all mocha suites

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https://hg.mozilla.org/integration/gaia-central/rev/6a6f84c4ebf8
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Bug 944279 - Use the spec reporter for all mocha suites
Bug 841660 - Implement format interface for volume-based device storage, r=dhylands
Bug 927016 - Create EV testsuite in xpcshell. r=keeler
Bug 942688 - Part1: Draw title bar decoration with CG directly (r=mstange).
Bug 942688 - Part2: Draw corner mask with Azure (r=mstange).
Bug 920123 - Make Start/Stop FrameTimeRecording work with OMTC and remove paint time recording. r=mattwoodrow
Bug 943041 - Don't delay compositing on the compositor thread in ASAP mode (layout.frame_rate == 0). r=BenWa
Bug 898199 - Reenable browser_dbg_event-listeners.js, in light of bug 941787 potentially fixing these sorts of problems, r=me
Bug 943197 - Remove useless -DIMPL_LIBXUL. r=mshal
Bug 943733 -  Finish removing PRE_RELEASE_SUFFIX. r=rstrong
Bug 943743 - Remove NATIVE_THEME_SUPPORT. r=karlt
Bug 942432 - Remove nsIJSEventListener::mContext, r=bz
Bug 935999 - Fix Ion addprop stub to support type checks. r=shu
bug 943270 - use EncodingUtils::DecoderForEncoding instead of nsICharsetConverterManager::GetUnicodeDecoderRaw when decoding font names. r=jdaggett
bug 943319 - use our standard ArrayLength() instead of a custom macro. r=jdaggett
Bug 943614 - Make sure that DataSourceSurface::GetDataSurface always returns a surface that has GetType() == SURFACE_DATA. r=Bas
Bug 943614 - Make sure that SourceSurfaceCairo::GetDataSurface always returns a surface that has GetType() == SURFACE_DATA. r=Bas
Bug 943614 - Make sure that SourceSurfaceCG::GetDataSurface always returns a surface that has GetType() == SURFACE_DATA. r=Bas
Bug 930956 - Make DrawTargetCG::DrawSurface support painting a DataSourceSurface that is not a DataSourceSurfaceCG. r=jrmuizel, r=Bas
Bug 942268 - Add RecordedEvent::GetEventName. r=mstange