Bug 1048064 - Fix libstagefright build on GNU/kFreeBSD. r=ajones, a=NPOTB

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extra : rebase_source : a83b95326f1ef292af68d23c5832b81444cdc37c
Bug 995075 - Include update_filter() changes from upstream speexdsp. r=padenot, a=sledru

This includes changes to update_filter() that landed on m-c in bug 1042504.

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extra : rebase_source : 6b41129fbcc09491040110497b0cc06a81b276f5
Bug 1037740 - Update empty private tabs panel styles for small tablet. r=wesj, a=sledru

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extra : rebase_source : bc0c1b1c95e1cd555c764658a010440e71666452