xdp-tools-1.3.1-bp156.1.9

- Do not package test files for xdp-tools
  + this also means we longer get the arch-dependent-file-in-usr-share rpmlint
  error, so xdp-tools.rpmlintrc can be removed

- Specify which group each package belong
- Add patch markup for the 2 patches in the package

- Use %set_build_flags macro to set the CFLAGS and LDFLAGS environment
  variable
- Add util-xdp_samples-Only-ignore-Wstringop-truncation-di.patch to compile on
  GCC 7 and earlier
- Add lib-Install-BPF-objects-as-non-executable.patch to prevent stripping of
  BPF object files

- Update to v1.3.1 from v1.2.0
- Add /usr/sbin to PATH during build so bpftool can be found

- Initial commit of xdp-tools