[Mono-list] Target to build and run automated tests

[Alexander Klyubin]

Hi!

I added makefile to mcs/class/corlib/Test. Compiling of the tests is
connected to the whole process of compiling 'mcs' subproject. In order to
run the tests, run "make runtests" in mcs/class/corlib/Test.

P.S. I found that there is one class QueueTest.cs that wound't compile. It
is currently removed from the list of tests
because of this.

Alexander Klyubin