Automated checkin: version bump for fennec 23.0b8 release. DONTBUILD CLOSED TREE a=release

--HG--
branch : MOBILE230b8_2013072401_RELBRANCH
Added FENNEC_23_0b8_RELEASE FENNEC_23_0b8_BUILD2 tag(s) for changeset 70c7777d53f0. DONTBUILD CLOSED TREE a=release

--HG--
branch : MOBILE230b8_2013072401_RELBRANCH