tools/sstrip: add PKG_{VERSION,RELEASE}
Comparing the in tree stored source file of sstrip suggests it's version
2.0[0], reflect that in the Makefile.
Motivation is the tracking of changes in the buildsystem, which requires
versioning of packages.
[0]: https://github.com/BR903/ELFkickers/commit/df4426a0f0ada861064d75c08cbebaac7c16b3ae#diff-d3ba694d91432a068d5d3b36abf8cd0f
Signed-off-by: Paul Spooren <[email protected]>
Paul Spooren