x11/dmenu: update to 4.6
- Explicitly track direct fontconfig dependency
- Define LICENSE_FILE as MIT has many styles https://fedoraproject.org/wiki/Licensing:MIT
Changes: http://lists.suckless.org/dev/1511/27503.html
PR: 205236
Reported by: Jakub Lach, Randy Westlund
Pointy hat to: jbeich (timeout-happy)
Approved by: r403178 regression