BaseTools/PatchCheck: Support Contribution Agreement 1.1
BaseTools/PatchCheck: Support Contribution Agreement 1.1

https://bugzilla.tianocore.org/show_bug.cgi?id=628

Update PatchCheck.py to support either
"Contributed-under: TianoCore Contribution Agreement 1.0"
or "Contributed-under: TianoCore Contribution Agreement 1.1"
in the commit message.

Temporarily continue to allow the TianoCore Contribution
Agreement 1.0 agreement.

Cc: Leif Lindholm <a613079f0455438b29e28a9c5b9eb3779a81a33a@linaro.org>
Cc: Andrew Fish <be8d29debaaf5173b4b7ecb4ace852732e71f7b9@apple.com>
Cc: Jordan Justen <a79006884ba9cf5f4f7fcbb92a15b208780d8c97@intel.com>
Cc: Liming Gao <6480311aeeb4b006862f6d13ebabddc03f51e507@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Michael D Kinney <fd20bc543a9f65bb633fac7d08a403c1f1c8eb6c@intel.com>
Reviewed-by: Jordan Justen <a79006884ba9cf5f4f7fcbb92a15b208780d8c97@intel.com>
Reviewed-by: Leif Lindholm <a613079f0455438b29e28a9c5b9eb3779a81a33a@linaro.org>

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