qt5-mac w/o parallel build

[René J. V. Bertin]

Jake Petroules wrote:

> Thanks from me as well! Marcus, could you update Qt to 5.4.2 as well please?

Fully prepared here (just remove the -devel from port name):
https://github.com/RJVB/macstrop/tree/master/aqua/qt5-devel

(with github.com/RJVB/macstrop/blob/master/_resources/port1.0/group/qt5-1.0.tcl
)

(allowing me some troll[tech]ing in this particular case :] )