These patches break bpftrace. I checked upstream and didn't see a newer
release than 0.11.4.

In file included from /tmp/guix-build-bpftrace-0.11.4.drv-0/bpftrace-0.11.4-checkout/src/btf.cpp:20:
/gnu/store/w9yqdg4v092cblkkbpwcpvyfpdppvn3r-libbpf-0.3/include/bpf/btf.h:125:14: error: ISO C++ forbids forward references to 'enum' types
                             enum btf_func_linkage linkage, int proto_type_id);
                                  ^
1 error generated.
make[2]: *** [src/CMakeFiles/bpftrace.dir/build.make:105: src/CMakeFiles/bpftrace.dir/btf.cpp.o] Error 1

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Efraim Flashner   <efraim@flashner.co.il>   אפרים פלשנר
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