testbed is now functional

I would like to make sure some _ tests are
passing, however I have to think of a nice
way to grab debug output and compare it
nicely.  Some require NReg == 3, that is a
pain in the ass.  Maybe they can be changed
to work for the full register set.

lisc/test/dark.ssa

@@ -22,3 +22,9 @@ function $test(:magic %p) {
 @fin
 	ret
 }
+
+# >>> driver
+# extern void test(void);
+# int a = 2;
+# int main() { test(); return !(a == 5); }
+# <<<