net/quiterss: update to 0.18.2, add QT5 option, fix Qt4 dependencies

• Update to 0.18.2
• Add Qt5 option and switch to it by default (as it was done in 0.18.0).
• Fix Qt4 dependencies (qt4-linguist -> qt4-linguisttools, drop qt4-designer)
• Don't build debug & release at the same time (and add DEBUG option)
• Use ${DATADIR} variable.
• Add LICENSE_FILE.

PR: 202336
Submitted by: s3erios@gmail.com
Approved by: coder@tuxfamily.org (maintainer)