update to latest checkreq - translate external LHAPDF to Lhapdf


git-svn-id: svn+ssh://svn.cern.ch/reps/atlasoff/AtlasPolicy/trunk@540455 4525493e-7705-40b1-a816-d608a930855b
cmt/requirements: In patterns (named_)dual_use_library, unset macro <package>_stamps, set macros <package>stamps and <library>stamps


git-svn-id: svn+ssh://svn.cern.ch/reps/atlasoff/AtlasPolicy/trunk@540883 4525493e-7705-40b1-a816-d608a930855b