Convert USE_PYTHON_RUN to new USES syntax;
Appease the angry DEVELOPER=YES god

Approved by:	mat
Include RPATH in the libs, again.
It seems that USES=libtool doesn't rewrite ${LIBTOOL} in
a configure script to use ${LOCALBASE}/bin/libtool like
bsd.autotools.mk did.
So, rewrite it explicitly for workaround.

PR:		194176
Submitted by:	jhujhiti__at__adjectivism.org
- Add LICENSE_FILE
- Convert to USES=python
- Drop @dirrm* from plist
- Add LICENSE
- Drop @dirrm* from plist
- Clarify LICENSE
- Add LICENSE_FILE
- No need to set GH_PROJECT
- Drop @dirrm* from plist
- Simplify plist
- Clarify LICENSE
- Add LICENSE_FILE
- Convert to USES=python
- Drop @dirrm* from plist
- Drop @dirrm* from plist
- Convert to USES=python
- Add LICENSE_FILE
- Clarify LICENSE
- Add LICENSE_FILE
- Drop @dirrm* from plist
- Add LICENSE_FILE
- Drop @dirrm* from plist
- Drop @dirrm* from plist
- Clarify LICENSE
- Add LICENSE_FILE
- Drop @dirrm* from plist