Automated checkin: version bump for fennec 23.0b6 release. DONTBUILD CLOSED TREE a=release

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branch : MOBILE230b6_2013071518_RELBRANCH
Added FENNEC_23_0b6_RELEASE FENNEC_23_0b6_BUILD1 tag(s) for changeset 021f0a008163. DONTBUILD CLOSED TREE a=release

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branch : MOBILE230b6_2013071518_RELBRANCH