Also replace %global compat_build 0 with %bcond_with compat_build.
This will make it easier to test building the compat version of the
package and allow us to add a CI test for it.
- Add some missing Requires
- Add --threads option to run-lit-tests script
- Set PATH so lit can find tools like count, not, etc.
- Don't hardcode tools directory to /usr/lib64/llvm
- Fix typo in yaml-bench define
- Only print information about failing tests
- Run tests in CI with only 1 thread
