This saves some patches, since they are already included.

Preparing the source tree is described here:

  https://wiki.qt.io/Building_Qt_5_from_Git

The helper script is located at:

 /project/admin/tools/qt_source_preparation

Also account for the changed location of the plugins
directory, which is under lib.

Rationale: building the plugin requires QScintilla to
be installed.

QT4 is supposed to be history. Well, very old packages might
need help from .compatlibs, but that is how the cookie crumbles :)

The only dependencies in the system belong to /usr/lib/liblastfm.so.1
and /usr/lib/libpoppler-qt4.so.4.0.0. Better make this a task on
its own to check if they are needed.

Note, bee throws a warning ...

 WARNING: system and image files named '/usr/local/lib/plugins' differ
          image : directory
          system: symbolic link to /usr/local/qt5/lib/plugins

What is correct, so instead of update it is:

 #> bee remove qtlinks-1.0.1-5.x86_64
 #> bee install qtlinks-1.0.2