Automated checkin: version bump for firefox 26.0b3 release. DONTBUILD CLOSED TREE a=release

--HG--
branch : GECKO260b3_2013110718_RELBRANCH
Added FIREFOX_26_0b3_RELEASE FIREFOX_26_0b3_BUILD1 tag(s) for changeset 20e947c64012. DONTBUILD CLOSED TREE a=release

--HG--
branch : GECKO260b3_2013110718_RELBRANCH