gpsd: Remove package version from the navcom patch

If the buildroot infrastructure finds a patch file that contains the
$PKG-$VERSION tuple in the filename, it will only apply this kind of
patches, ignoring the rest of the patches in the package directory.
As a result of which, the gpsd-fix-libgpsmm.patch did not apply
because the gpsd-2.95-navcom.patch satisfies the $PKG-$VERSION convention.
The buildroot policy (as discussed during the Buildroot Developer meeting)
is to remove the package version from the patch filename.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>