tizen/gbs: https://gitorious.org/tizenbuildtools/gbs/activities

Zhang Qiang 3889243e4c bump to official version 0.21		%!s(int64=10) %!d(string=hai) anos
..
.test-requires	727c6002b9 Added nose, mock and coverage to .test-requires	%!s(int64=11) %!d(string=hai) anos
gbs.changes	8bd855ee37 Add Release notes for gbs 0.21	%!s(int64=10) %!d(string=hai) anos
gbs.spec	3889243e4c bump to official version 0.21	%!s(int64=10) %!d(string=hai) anos