ck-0.6.0-bp153.2.15

- Fix symbol name clash between glibc 2.30 and ck, add
  ck-fix-gettid-glibc-clash.patch
- Reenable tests again

- Disable tests as they fail with gcc9

- Add ck-fix-j1.patch to fix build with -j1

- Small packaging changes

- Add _constraints to avoid test failures

- Disable s390 building as it is not supported architecture

- Update to version 0.6.0

- include license file
- explain why we don't use the configure macro

- initial package