mono/mono — pull request #1272 by Hzj-jie (2014-09-10 17:21:15+00:00)
Title: implement System.Threading.Thread.Priority get and set methods

this change is to implement System.Threading.Thread.Priority get and set methods.
on posix systems, it will call pthread_setschedparam and pthread_getschedparam, while on windows, the set call has no effect, the get call returns normal.