Automated checkin: version bump for firefox 24.0b1 release. DONTBUILD CLOSED TREE a=release

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branch : GECKO240b1_2013080619_RELBRANCH
Added FIREFOX_24_0b1_RELEASE FIREFOX_24_0b1_BUILD2 tag(s) for changeset 7737a1669f88. DONTBUILD CLOSED TREE a=release

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branch : GECKO240b1_2013080619_RELBRANCH