xrootd: move to 3.3.3; no private headers in incl. path

Signed-off-by: David Abdurachmanov <David.Abdurachmanov@cern.ch>
config.map: update architectures

Remove:
- osx107_amd64_gcc472
- slc6_amd64_gcc472

Add:
- osx108_amd64_gcc481

Signed-off-by: David Abdurachmanov <davidlt@cern.ch>
py2-python-dateutil-toolfile: new SCRAM toolfile

Add a missing toolfile needed for matplotlib package.

Signed-off-by: David Abdurachmanov <davidlt@cern.ch>
Merge remote-tracking branch 'origin/xrootd-move-to-3.3.3' into IB/CMSSW_7_0_X/devel-gcc48
Merge pull request #182 from davidlt/sep-04-misc-updates-gcc48

[CMSSW_7_0_X][48] Misc. changes