Thread: pgbuildfarm - client-code: Support buildfarm client maintained git

Log Message:
-----------
Support buildfarm client maintained  git mirror, original suggestion from Rémi Zara. Send id of current git head to
server,suggestion from David Fetter. 

Modified Files:
--------------
    client-code:
        run_build.pl (r1.114 -> r1.115)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbuildfarm/client-code/run_build.pl?r1=1.114&r2=1.115)
    client-code/PGBuild:
        SCM.pm (r1.10 -> r1.11)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbuildfarm/client-code/PGBuild/SCM.pm?r1=1.10&r2=1.11)