x11/tabbed: Update to 0.8

New binary and manpage: xembed.
Switch to DISTVERSION.
Use localbase:ldflags, doesn't need patching config.mk.
Add libfontconfig dependency.
Add xft and xorgproto to USES_XORG.
Add LICENSE_FILE.

PR:		282583
Approved by:	maintainer timeout (2+ weeks)