[build.pl] Add a -testName arg for running specific tests ..
[build.pl] Add a -testName arg for running specific tests ..

.. this passes the argument to nunit-console -run:$testName

AndyGerlicher/msbuild,jeffkl/msbuild,Microsoft/msbuild,AndyGerlicher/msbuild,rainersigwald/msbuild,Microsoft/msbuild,rainersigwald/msbuild,cdmihai/msbuild,jeffkl/msbuild,sean-gilliam/msbuild,cdmihai/msbuild,chipitsine/msbuild,cdmihai/msbuild,cdmihai/msbuild,sean-gilliam/msbuild,mono/msbuild,mono/msbuild,AndyGerlicher/msbuild,chipitsine/msbuild,jeffkl/msbuild,jeffkl/msbuild,mono/msbuild,sean-gilliam/msbuild,chipitsine/msbuild,mono/msbuild,AndyGerlicher/msbuild,rainersigwald/msbuild,Microsoft/msbuild,Microsoft/msbuild,sean-gilliam/msbuild,rainersigwald/msbuild,chipitsine/msbuild