xfail the tests for now, pending #1511 being fixed

Author: nikomatsakis

src/test/run-pass/tag-auto-disr-val-shape.rs

@@ -0,0 +1,10 @@
+// xfail-test
+
+enum color { red; green; blue; black; white; }
+
+fn main() {
+    assert (uint::to_str(red as uint, 10) == #fmt["%?", red]);
+    assert (uint::to_str(green as uint, 10) == #fmt["%?", green]);
+    assert (uint::to_str(white as uint, 10) == #fmt["%?", white]);
+}
+

src/test/run-pass/tag-disr-val-shape.rs

@@ -1,4 +1,5 @@
 // xfail-pretty Issue #1510
+
 tag color {
     red = 0xff0000;
     green = 0x00ff00;