Normalize symbol ids to 0 in test stdout

The number of symbols we allocate (even early on) seems to be platform
dependent. We only care about hygiene for the purposes of this test,
so just set all of the symbol ids to zero

src/test/ui/proc-macro/meta-macro-hygiene.rs

@@ -3,7 +3,9 @@
 // edition:2018
 // compile-flags: -Z span-debug -Z unpretty=expanded,hygiene
 // check-pass
-
+// normalize-stdout-test "\d+#" -> "0#"
+// ^ We don't care about symbol ids, so set them all to 0
+// in the stdout
 extern crate meta_macro;
 
 fn main() {

src/test/ui/proc-macro/meta-macro-hygiene.stdout

@@ -1,18 +1,20 @@
 Def site: $DIR/auxiliary/make-macro.rs:5:9: 8:10 (#3)
-#![feature /* 280#0 */(prelude_import)]
-#[prelude_import /* 527#1 */]
-use std /* 687#1 */::prelude /* 526#1 */::v1 /* 783#1 */::*;
-#[macro_use /* 404#1 */]
-extern crate std /* 687#1 */;
+#![feature /* 0#0 */(prelude_import)]
+#[prelude_import /* 0#1 */]
+use std /* 0#1 */::prelude /* 0#1 */::v1 /* 0#1 */::*;
+#[macro_use /* 0#1 */]
+extern crate std /* 0#1 */;
 // aux-build:make-macro.rs
 // aux-build:meta-macro.rs
 // edition:2018
 // compile-flags: -Z span-debug -Z unpretty=expanded,hygiene
 // check-pass
+// normalize-stdout-test "\d+#" -> "0#"
+// ^ We don't care about symbol ids, so set them all to 0
+// in the stdout
+extern crate meta_macro /* 0#0 */;
 
-extern crate meta_macro /* 834#0 */;
-
-fn main /* 406#0 */() { }
+fn main /* 0#0 */() { }
 
 /*
 Expansions: