unictype/ctype-*: Relax license.
* lib/gen-uni-tables.c (output_predicate): Bump copyright year. For
unictype/ctype_*, use the LGPLv2+.
* lib/unictype/ctype_*.h: Regenerated.
* lib/unictype/ctype_*.c: Update license notice.
* modules/unictype/ctype-alnum (License): Change to LGPLv2+.
* modules/unictype/ctype-alpha (License): Likewise.
* modules/unictype/ctype-blank (License): Likewise.
* modules/unictype/ctype-cntrl (License): Likewise.
* modules/unictype/ctype-digit (License): Likewise.
* modules/unictype/ctype-graph (License): Likewise.
* modules/unictype/ctype-lower (License): Likewise.
* modules/unictype/ctype-print (License): Likewise.
* modules/unictype/ctype-punct (License): Likewise.
* modules/unictype/ctype-space (License): Likewise.
* modules/unictype/ctype-upper (License): Likewise.
* modules/unictype/ctype-xdigit (License): Likewise.