fio-3.38-160000.2.2

- Disable librbd on SLES16.0 and higher (bsc#1241271)

- update to 3.38:
  * https://git.kernel.dk/?p=fio.git;a=shortlog;h=refs/tags/fio-3.38

- Drop the unneeded libpmemblk-devel build dependency. This
  subpackage is gone is latest pmdk releases

- remove dependency on /usr/bin/python3 using
  %python3_fix_shebang macro, [bsc#1212476]

- update to 3.37:
  * https://git.kernel.dk/?p=fio.git;a=shortlog;h=refs/tags/fio-3.37

- update to 3.36:
  * https://git.kernel.dk/?p=fio.git;a=shortlog;h=refs/tags/fio-3.36

- update to 3.35:
  * https://git.kernel.dk/?p=fio.git;a=shortlog;h=refs/tags/fio-3.35

- Enable iscsi and nbd
- Small spec file cleanup

- update to 3.34:
  * https://git.kernel.dk/?p=fio.git;a=shortlog;h=refs/tags/fio-3.34

- update to 3.33:
  * https://git.kernel.dk/?p=fio.git;a=shortlog;h=refs/tags/fio-3.33