[$] Next steps for BPF support in the GNU toolchain

Support for BPF in the kernel has been tied to the LLVM toolchain since the
advent of extended BPF. There has been a growing effort to add BPF support
to the GNU toolchain as well, though. At the 2025 GNU Tools Cauldron, the
developers involved got together with representatives of the kernel
community to talk about the state of that work and what needs to happen
next.