Add the ability to self report a crash

[chrisdp]

When using a library like https://github.com/rokucommunity/promises users my want to be able to report a test as crashes them selfs. Consider this slimmed down example:

@async
@it("loginUser success path")
function _()
	m.node.top.isLoggedIn = false
	' Success Test
	promises.chain(loginUser({
		email: "[email protected]"
		password: "1234"
	})).catch(sub(error as dynamic)
		' Report that the test failed due to a crash
		m.testSuite.failCrash(error)
	end sub).finally(sub()
		m.testSuite.assertTrue(m.top.isLoggedIn)
		m.testSuite.done()
	end sub)
end function

[chrisdp]

@georgejecook I don't mind taking this one. Logging it as an issue so I don't forget.