Update Unicode data files to version 11.0.0 of Unicode

Update Unicode data files to version 11.0.0 of Unicode

* admin/unidata/UnicodeData.txt:
* admin/unidata/SpecialCasing.txt:
* admin/unidata/NormalizationTest.txt:
* admin/unidata/copyright.html:
* admin/unidata/BidiMirroring.txt:
* admin/unidata/BidiBrackets.txt: Import from Unicode 11.0.
* admin/notes/unicode: Update the URL for OTF script tags.

* lisp/international/mule-cmds.el (ucs-names): Update unused ranges.
* lisp/international/fontset.el (script-representative-chars): Add
hanifi-rohingya, old-sogdian, sogdian, dogra, gunjala-gondi,
makasar, and medefaidrin.
(otf-script-alist): Add old-hungarian.
* lisp/international/characters.el (tbl): Add syntax entries for
Supplemental Mathematical Operators, Miscellaneous Symbols and
Arrows, and Supplemental Punctuation.
Update the list of wide characters.

* test/lisp/international/ucs-normalize-tests.el
(ucs-normalize-tests--failing-lines-part2): Update to match
admin/unidata/NormalizationTest.txt.

* doc/lispref/nonascii.texi (Character Properties): Update the
reference to the Unicode Standard.
* doc/misc/efaq.texi (New in Emacs 26):
* etc/NEWS: Mention compatibility with Unicode 11.0.