- Update to gcc-13 branch head, 741743c028dc00f27b9c8b1d5, git8109
* Includes fix for building mariadb on i686. [bsc#1217667]
* Remove pr111411.patch contained in the update.

- Avoid update-alternatives dependency for accelerator crosses.
- Package tool links to llvm in cross-amdgcn-gcc13 rather than in
cross-amdgcn-newlib13-devel since that also has the dependence.
- Depend on llvmVER instead of llvm with VER equal to
%product_libs_llvm_ver where available and adjust tool discovery
accordingly. This should also properly trigger re-builds when
the patchlevel version of llvmVER changes, possibly changing
the binary names we link to. [bsc#1217450]