glmark2: Update to current version

[ssumpf]

Genode's glmark2 does not compile with gcc-12. It could be fixed by patches, but I think an update is the preferred solution.

[ssumpf]

429642d updates glmark2, but requires 57e2b6d from my gcc-12 branch for

std::basic_filebuf<char, std::char_traits<char> >::basic_filebuf(std::basic_filebuf<char, std::char_traits<char> >&&)

[chelmuth]

Thanks, merged both commits to the staging branches.

[chelmuth]

Merged to master.