archivers/lrzip: Improve port
- Use upstream release archive as recommended by Porters Handbook
- Define WWW
- Define ONLY_FOR_ARCHS (upstream only supports 64-bit platforms)
- Remove CFLAGS, LDFLAGS and use USES= localbase:ldflags helper instead
- Rework USES section
- Remove unncessary GNU_CONFIGURE_MANPREFIX definition
PR: 297742
Reviewed by: delphij (maintainer)