Merge pull request #727 from fwyzard/IB/CMSSW_7_1_X/debug

scram-project-build.file: fix processing of debug symbols
update debug subpackage functionality

scram-project-build.file:
  - remove old RPM workaround
  - update code to build the list of .debug directories

subpackage-debug.file
  - remove old RPM workaround