Update to latest Unicode 6.0 beta data files.

Update to latest Unicode 6.0 beta data files.

* admin/unidata/BidiMirroring.txt: Update from
  http://www.unicode.org/Public/6.0.0/ucd/BidiMirroring-6.0.0d2.txt

* admin/unidata/UnicodeData.txt: Update from
  http://www.unicode.org/Public/6.0.0/ucd/UnicodeData-6.0.0d7.txt

* lisp/international/uni-bidi.el:
* lisp/international/uni-category.el:
* lisp/international/uni-combining.el:
* lisp/international/uni-decimal.el:
* lisp/international/uni-mirrored.el:
* lisp/international/uni-name.el: Regenerate.

* src/biditype.h: Regenerate.