deal with linking issues detected by adequate

piuparts.py and piuparts-reports.py: add "ldd" to inadequate_tags and known_problems.
Improve adequate tag detection
fixup: c8e91f2257b68f26cbf6de0e0ed56e563cb1ec97 (detection of ldd issues by adequate)
fixup: c8e91f2257b68f26cbf6de0e0ed56e563cb1ec97 (detection of ldd issues by adequate)
fixup d631ca4107926c148f0424b4f505fe9472c733bb: also link unknown adequate results
Merge branch 'develop' into bikeshed