scripts/check-kernel-fix: make states more descriptive
    
    It is not easy to find reasoning behind different states. Change that
    to the following:
    
    ok -> ok_reference_present
    	- the CVE reference is present (sha might be missing because of
    	  a custom/non-upstream backport)
    ok -> ok_commit_present
    	- the sha is present
    ok_will_merge -> ok_will_merge
    	- solution will be merged from a parent branch
    
    missing_references -> ok_missing_references
    	- the sha is present but references missing
    missing_patch -> missing_commit
    	- commit is needed but not applied
    maybe_missing_patch -> maybe_missing_commit
    	- review is need to see whether the commit is required (Fixes
    	  tag missing)
    
    nope -> nope_cvss
    	- doesn't qualify based on CVSS scoring
    nope -> nope_commit_in_base
    	- the commit is already in the base kernel
    nope -> nope_unaffected
    	- the commit is not needed as the breaker is not present