737fb452fc
If `cpp_debugstl` is enabled in the build configuration, then libstdc++ will try to use `==` on operators in certain cases to carry out extra checks. This leads to build failures because `StringSplitter::iterator` has no `operator==`. Implement `operator==`, and express `operator!=` in terms of it. Signed-off-by: Barnabás Pőcze <pobrn@protonmail.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>