MFH: r547338

devel/xboard: fix build in 13-current

Another case of -fno-common
This fixes the slave port devel/xboard-devel too.

While here, add missing USE_XORG modules.

PR: 248984
Reported by: kalten@gmx.at

Approved by: ports-secteam (blanket, build fix, -fno-common)