misc/wmjulia fix 13-Current build
Another instance of -fno-common issue.
While here:
- Add missig USE_XORG dependency
- Reorganize WRKSRC so we don't generate weird patches
- Pet linters
PR: 249462
Submitted by: jd.fbsd@goneja.de
MFH: 2020Q3 (build fix, -fno-common)