Update PyQt 4 to 4.12, PyQt 5 to 5.7.1 and sip to 4.19.1

[tcberner]

Summary

• This is mostly based on the work by @groot_kde.org in our development repo.
• Includes the stripping of devel/py-sip's binary bin/sip and [...]/lib/sip.so from pr 217305 (maybe look into why this is not done :) ).

Test Plan

Test some PyQt applications, and maybe exp-run?

[tcberner]

• misc/py-qt4-demo not use "-f" for ${RM}.

[tcberner]

Add patches for graphics/qgis and math/qtiplot obtained from gentoo to fix the build with sip-4.19.1

• py-pykde4 is not yet patched -- once this is done, we can do an exp-run.

[rakuco]

In D9771#207829, @tcberner wrote:

Add patches for graphics/qgis and math/qtiplot obtained from gentoo to fix the build with sip-4.19.1

• py-pykde4 is not yet patched -- once this is done, we can do an exp-run.

I tried looking at what's going on with pykde4, and the problem's that sip is now generating a class inheriting KAutoMount, which has a private destructor. I'm unsure if that was an intentional change or a bug, so I've sent an email to the PyQt mailing list: https://www.riverbankcomputing.com/pipermail/pyqt/2017-April/039033.html

[rakuco]

In D9771#211579, @rakuco wrote:

I tried looking at what's going on with pykde4, and the problem's that sip is now generating a class inheriting KAutoMount, which has a private destructor. I'm unsure if that was an intentional change or a bug, so I've sent an email to the PyQt mailing list: https://www.riverbankcomputing.com/pipermail/pyqt/2017-April/039033.html

So it turns out this was an actual bug in sip. @groot_kde.org: can you incorporate https://www.riverbankcomputing.com/hg/sip/rev/6b09a6d578e8 into devel/py-sip? BTW, new sip and PyQt versions have been released, so it'd be nice to have them as well.

[tcberner]

Add the upstream patch found by @rakuco. Now py-pykde4 should build fine.

I'll ask for an exp-run.

[rakuco]

Not a requirement, but I think you should take the opportunity and update to the latest sip release (4.19.2).

[tcberner]

With sip 4.19.2

[rakuco]

Just ask for an exp-run and we're ready to go!