data-MagneticField-Interpolation: bump version to V00-05-00

Update data-MagneticField-Interpolation to match CMSSW_6_2_0.
Change the structure of SPEC file. No need to update SubSystem/
Package/Data/**/download.url files in CMSSW repository. Only
data SPEC files needs to be modified.

Signed-off-by: David Abdurachmanov <David.Abdurachmanov@cern.ch>
xrootd: bump version to 3.3.3-rc1

Signed-off-by: David Abdurachmanov <David.Abdurachmanov@cern.ch>
llvm: bump version to 3.3 (llvm r183501, clang r183502)

- Update LLVM/Clang stack to 3.3
- Add Python to BuildRequires as default system Python is too old
  for building LLVM/Clang. Maybe it's needed for Clang Python bindings?
- Attemp to enable -O4 (-O3 + LTO [requires ld.gold])

Signed-off-by: David Abdurachmanov <David.Abdurachmanov@cern.ch>
CGAL,CGAL-toolfile,cmssw-tool-conf: new external

Add new external to CMSSW, CGAL 4.2.

Signed-off-by: David Abdurachmanov <David.Abdurachmanov@cern.ch>
xrootd: bump version to 3.3.3-rc2

Signed-off-by: David Abdurachmanov <David.Abdurachmanov@cern.ch>