Automated checkin: version bump for firefox 23.0b7 release. DONTBUILD CLOSED TREE a=release

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branch : GECKO230b7_2013071818_RELBRANCH
Added FIREFOX_23_0b7_RELEASE FIREFOX_23_0b7_BUILD1 tag(s) for changeset 1897bd316ab6. DONTBUILD CLOSED TREE a=release

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branch : GECKO230b7_2013071818_RELBRANCH