Make pretty-expanded-hygiene a ui test

`normalize-stdout-test` removes the need for Make, and it can be updated
with `--bless` this way

src/test/ui/hygiene/unpretty-debug.rs

@@ -0,0 +1,20 @@
+// check-pass
+// compile-flags: -Zunpretty=expanded,hygiene
+
+// Don't break whenever Symbol numbering changes
+// normalize-stdout-test "\d+#" -> "0#"
+
+// minimal junk
+#![feature(no_core)]
+#![no_core]
+
+macro_rules! foo {
+    ($x: ident) => { y + $x }
+}
+
+fn bar() {
+    let x = 1;
+    foo!(x)
+}
+
+fn y() {}

src/test/ui/hygiene/unpretty-debug.stdout

@@ -0,0 +1,15 @@
+// check-pass
+// compile-flags: -Zunpretty=expanded,hygiene
+
+// Don't break whenever Symbol numbering changes
+// normalize-stdout-test "\d+#" -> "0#"
+
+// minimal junk
+#![feature /* 0#0 */(no_core)]
+#![no_core /* 0#0 */]
+
+macro_rules! foo /* 0#0 */ { ($ x : ident) => { y + $ x } }
+
+fn bar /* 0#0 */() { let x /* 0#0 */ = 1; y /* 0#1 */ + x /* 0#0 */ }
+
+fn y /* 0#0 */() { }