Add libgsignon-glib as dependency

BUG=https://crosswalk-project.org/jira/browse/XWALK-2134
Merge pull request #357 from halton/sso_fix

Add libgsignon-glib as dependency
Bump version to 0.85
[Alarm] Fix failures raised from test suite.
I've downloaded the test suite from http://otcqa.sh.intel.com/qa-auto/live/Web_TCT_Xwalk/ and run them manually.
All the alarm related failures in the test suite have been fixed.

BUG=XWALK-2163