Fix path resolve not works correct

[KunXi-Fox]

This PR is the fix of this issue: https://github.com/canalplus/rx-player/issues/1440.

From what I'm understanding, for path resolve: '/a/b/c' and https://a.b/c result should be https://a.b/a/b/c not https://a.b/c/a/b/c.