Merge pull request #117 from davidlt/IB/CMSSW_7_0_X/stable

[CSSW_7_0_X] Add more fake Provides: records for GIT for SLC6
Pick up correct revision for the buildLogAnalyzer.
cmssw-ib: updated svn revision to 2829
Merge pull request #122 from davidlt/IB/CMSSW_7_0_X/stable

[CMSSW_7_0_X] LLVM/Clang, CGAL, GIT, xrootd, data-MagneticField-Interpolation