Backport pacparser and frontier_client from CMSSW_7_0_X.

Signed-off-by: David Abdurachmanov <David.Abdurachmanov@cern.ch>
Backport GIT from CMSSW_7_0_X.

Signed-off-by: David Abdurachmanov <David.Abdurachmanov@cern.ch>
added missing files frontier_client-2.8.5-fix-gcc47.patch and git-1.8.3.1-no-symlink.patch
Merge branch 'IB/CMSSW_5_3_X/stable' of github.com:cms-sw/cmsdist into IB/CMSSW_5_3_X/stable