rdma-core-20.4:

Updates from version 20.3

• Backport fixes:
  • cbuild: Fix packaging of SuSE leap
  • cbuild: extend CLI to pass --with[out] options to rpmbuild
  • cbuild: fix python path for leap
  • buildlib: update SUSE validation targets
  • travis: fix aarch64 extraction
  • ccam: Properly enable ilog32() calculations
  • suse: fix dracut support
  • libhns: Bugfix for flush cqe in case multi-process