Build python3 against ncursesw

[linkmauve]

I’m trying to build a Python application against your 1.6 release of org.freedesktop.Platform, and I found out that this platform has Python built against libncurses.so instead of libncursesw.so.

This command shows the wrong library being linked:
ldd ~/.local/share/flatpak/runtime/org.freedesktop.Platform/x86_64/1.6/3b442ccf3e8eb746db8cca8779f37a8cf5038ff835f063ff8d53cdb330b94e4c/files/lib/python3.5/lib-dynload/_curses.cpython-35m-x86_64-linux-gnu.so | grep curses

Surprisingly python2 is correctly built against libncursesw.so in this platform.

Please rebuild python3 and do a new release of the platform, so I can finish this flatpak package, thanks!