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

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branch : GECKO260_2013120223_RELBRANCH
Added FIREFOX_26_0_RELEASE FIREFOX_26_0_BUILD1 tag(s) for changeset 6d7564bf9e88. DONTBUILD CLOSED TREE a=release

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branch : GECKO260_2013120223_RELBRANCH