Hook up customizations for sq (Albanian) and de-duplicate

They were added in 2011 [1] but apparently never hooked up with the build system. Also remove the weird duplication of KDOCTOOLS_LANGUAGES_LIST. It isn't needed and because the "set" invocation uses a variable reference instead of the variable name it probably creates a variable with the name "af" containing "bg ca cs da ...".

This commit allows building the Albanian documentation of kturtle, which currently fails due some missing entities. As such it's a stopgap measure, likely to be replaced with a dynamic language list.

[1] 059121245d6d2b74287616d79416412680348ac0 in kdelibs.git