Automated checkin: version bump for firefox 26.0b4 release. DONTBUILD CLOSED TREE a=release

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branch : GECKO260b4_2013111118_RELBRANCH
Added FIREFOX_26_0b4_RELEASE FIREFOX_26_0b4_BUILD1 tag(s) for changeset ab495a0b16a0. DONTBUILD CLOSED TREE a=release

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branch : GECKO260b4_2013111118_RELBRANCH