Clean up KDE dev scripts

Patch by Vadim Zhukov
REVIEW: 110858

"Many KDE development scripts were written in a hurry and are:

* unportable, e.g.: using bash instead of sh
* unreliable, e.g.: using of $* instead of $@ in shell scripts
* unsecure, e.g.: using open($file) idiom in Perl scripts

I tweaked most obvious stuff that I found. This patch allows to better integrate KDE development process into OpenBSD ecosystem, and, probably, in ecosystem of other OSes. Not saying about getting more reliable results for non-usual cases, such as filenames with non-ASCII-alphanum-characters in them.

Given that KDE5 is coming, I think it's a good time to improve some core stuff. :)"