graphics/libwmf: update 0.2.8.4 -> 0.2.12

• Switch to active fork (removes the need to patch for mutliple CVEs) This is what Alpine Linux, Arch Linux, Debian and Fedora uses.
• Add patch to use pkg-config (pkgconfig) to detect freetype(2)

References:
https://github.com/caolanm/libwmf (no proper release notes available)
https://github.com/archlinux/svntogit-packages/blob/packages/libwmf/trunk/libwmf-freetype.patch

PR: 252114
Submitted by: daniel.engberg.lists@pyret.net