[Development] DEFAULT_INCDIR and DEFAULT_LIBDIR in Qt 5.8/configure

[René J. V. Bertin]

Oswald Buddenhagen wrote:

> the bulk of the code is in toolchain.prf.
> note that i have some related patches for 5.8 on gerrit.

Yes, I found toolchain.prf, and already replaced the reference to 
/usr/local/include in there (which I think is redundant anyway as most compilers 
on Unix look there anyway?).

Filtering in a QMake file won't be as trivial as in a regular shell script, but 
I'll try to find your patches on gerrit, thanks.

R.