cmssw-tool-conf: added eigen-toolfile dependency
Merge pull request #992 from smuzaffar/IB/CMSSW_7_2_X/stable

cmssw-tool-conf: added eigen-toolfile dependency
Merge remote branch 'origin/IB/CMSSW_7_2_X/stable' into IB/CMSSW_7_0_X/stable