Automated checkin: version bump for firefox 24.0b4 release. DONTBUILD CLOSED TREE a=release

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branch : GECKO240b4_2013081919_RELBRANCH
Added FIREFOX_24_0b4_RELEASE FIREFOX_24_0b4_BUILD1 tag(s) for changeset 995480afdf3e. DONTBUILD CLOSED TREE a=release

--HG--
branch : GECKO240b4_2013081919_RELBRANCH