Otherwise meson's find_program() can get confused by the output;
now in case of systemd build:
meson.build:1059:16: ERROR: Invalid version of program, need 'bpftool' ['>= 5.6.0'] found '01'.
bpftools causes way too many rebuilds nowadays,
so its updates are not suitable for merging directly to nixpkgs master.
We want to update linux_latest faster than that.
Without the change bpftools build fails on binutils-2.39 due to API change:
jit_disasm.c:105:17: error: too few arguments to function 'init_disassemble_info'
105 | init_disassemble_info(&info, stdout,
| ^~~~~~~~~~~~~~~~~~~~~
I needed some other bpf-related tools located in the kernel source tree,
so I hijacked the bpftool package, renamed it to bpftools and added
those programs.
