[CMSSW_7_0_X][48] Misc. updates

**ChangeLog**
- In _cascade-toolfile_ for Fedora Core we were not linking to any cascade library. Fix it for architectures starting with `fc`.
- GDB bump version to 7.6.1
- *coral-tool-conf* needs _bz2lib_ depedency as _pcre_ links to bz2lib. Otherwise we receive SCRAM warning about missing toolfile.
- Tauolapp 1.3.3 added dependencies for _lhapdf_ and _pythia8_, but such dependencies were never reflected in tauolapp toolfile. Add them.