The astro/gpsd update (r439960) removed libgpsd.so that Direwolf's LIB_DEPENDS
was described with. Direwolf actually depends on libgps.so, so this just gets
renamed to reflect actual dependency.

While here, one of the telemetry scripts uses #!/usr/local/bin/python, so mark
the dependency on the python metaport. No PORTREVISION bump because port was
failing to build as of r439960.

PR: ports/219096
Submitted by: bsdports@kyle-evans.net
Reported by: pkg-fallout
Approved by: Maintainer