Somewhat-enable random_test.py, and reduce size of interp2_small.py

random_test.py is running into the same issue as _random_test2.py,
of the rewrites failing.  Will deal with that next.

test/tests/interp2_small.py

@@ -104,7 +104,7 @@ def run(node):
     visit(InterpVisitor(), node)
 
 prog = [
-        AstAssign("x", 1000),
+        AstAssign("x", 500),
         AstAssign("t", 0),
         AstWhile("x", [
             AstAssign("t", AstBinop("t", "x", '+')),
@@ -117,7 +117,7 @@ run(prog)
 prog = [
         AstAssign("i", 2),
         AstAssign("t", 0),
-        AstWhile(AstBinop("i", 100, '<'), [
+        AstWhile(AstBinop("i", 60, '<'), [
             AstAssign("j", 2),
             AstAssign("good", 1),
             AstWhile(AstBinop(AstBinop("j", "j", '*'), "i", "<="), [

test/tests/random_test.py

-# expected: fail
-# - wip
+# allow-warning: converting unicode literal to str
+# skip-if: IMAGE != 'pyston_dbg'
+# fail-if: '-n' in EXTRA_JIT_ARGS or '-O' in EXTRA_JIT_ARGS
+# - failing to rewrite
 
 import random