getTokenFromUTF8: calls getTokenDirect
getTokenDirect: uses perfect hash

New makefile creates perfect hash table with perl-script gentoken.pl.
I found the script on https://wiki.openoffice.org/wiki/XFastTokenHandler and made some changes.
XMLTokens are defined in tokens.txt

Change-Id: Id04134a896ee082e2d0ba55a715fede19ff04928
Reviewed-on: https://gerrit.libreoffice.org/12335Reviewed-by: Michael Meeks <michael.meeks@collabora.com>
Tested-by: Michael Meeks <michael.meeks@collabora.com>