swc-installation-test-2.py: Add 'EasyMercurial'
swc-installation-test-2.py: Add 'EasyMercurial'

Chris Cannam just released v1.3.0 which adds a --version option for
easy version testing [1].

[1]: https://bitbucket.org/cannam/easyhg/issue/1/teach-easymercurial-the-version-option

selimnairb/2014-02-25-swctest,selimnairb/2014-02-25-swctest,selimnairb/2014-02-25-swctest,selimnairb/2014-02-25-swctest,selimnairb/2014-02-25-swctest,selimnairb/2014-02-25-swctest