Fixed build fail because of qt_gui_cpp

[levtempfli]

Builds were failing when building qt_gui_cpp with the error:

CMake Error at src/CMakeLists.txt:10 (message):
  No Python binding generator found.

Related: ros-visualization/python_qt_binding#103

[m2-farzan]

Hey, thanks for the PR. From the discussion you have linked, looks like this has been an issue for a while. However, I hadn't seen reports of that issue for this AUR package. Is there any recent change in the arch repos that has caused this to surface now?

Also, you need to bump the pkgrel both in PKGBUILD and .SRCINFO file :)

P.S. Are you running vanilla arch?

[levtempfli]

Sure, release number increased :))

I have tried to install this package on vanilla Arch and Manjaro, but it failed in both cases with the same error. I'm not sure what could have caused it, didn't use this package before, this was my first time installing it.

[dimich-dmb]

I can confirm that "No Python binding generator found" error occures on vanilla Arch and patch from this PR fixes the issue.