v0.4.5-libbpf-1.0.1

Fixes and tests included:

5df6c4f selftest: poc for multiple BPF objects that share a ringbuffer
89f37dd makefile: rename targets in selftests common
55b5ac3 Fix building on ppc64
688787f Fix builds on non-AMD64 architectures
74fa9b2 osinfo: add unit tests for helpers/osinfo.go
d0e93b7 makefile: turn libbpfgo-static into default (#277)
66a9ab6 selftests: fix spinlocks selftest
1161940 libbpf: mitigate libbpf_print_fn issues for tracee
aa91d8b libbpf: fix access violation in libbpf_print_fn.
6950f38 selftests: add spinlock selftest (#155)
6070c0d Add parsing function for mmap flags argument (#267)