Automated checkin: version bump for firefox 27.0b1 release. DONTBUILD CLOSED TREE a=release

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branch : GECKO270b1_2013120923_RELBRANCH
Added FIREFOX_27_0b1_RELEASE FIREFOX_27_0b1_BUILD1 tag(s) for changeset 63df4b1287c0. DONTBUILD CLOSED TREE a=release

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branch : GECKO270b1_2013120923_RELBRANCH