Bug#897594: kyrandia: games fail to build with gog installers

[Рома Тенцер]

innoextract 1.6 unpack the installers wrong.

innoextract 1.7 unpack the installers correct, but gdp still doesn't see 
data files (i checked with make-template). I think it's because they was 
moved: Book 2 and 3 to root directory, Book 1 to "DAT" directory (i 
checked them with scummvm. Yes, it's found the games there).

So there is two parts for solution. First: wait until innoextract 1.7 
appears in Debian (i made a request: 
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=902579). Second: 
fixing gdp scripts (developer's magic).