git: add more fake Provides: records for SLC6

Add more fake Provides: records for slc6_amd64_{gcc472,gcc480}:

- perl(CGI)
- perl(CGI::Carp)
- perl(CGI::Util)
- perl(Time::HiRes)

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