Add patch from upstream KDE git for CVE-2019-14744

Upstream description:

• https://kde.org/info/security/advisory-20190807-1.txt

Upstream solution:

KDE Frameworks 5 users:

• update to kconfig >= 5.61.0
• or apply the following patch to kconfig: https://cgit.kde.org/kconfig.git/commit/?id=5d3e71b1d2ecd2cb2f910036e614ffdfc895aa22

kdelibs4 is also affected, but that was removed from the ports tree
over six months ago.

MFH: 2019Q3
Security: CVE-2019-14744