testsuite: Adds test from issue

As the issue as been resolved, i just added the test from the issue.

Fixes #1081

gcc/testsuite/ChangeLog:

	* rust/compile/issue-1081.rs: New test.

Signed-off-by: lenny.chiadmi-delage <[email protected]>

Author: Villosse

gcc/testsuite/rust/compile/issue-1081.rs

@@ -0,0 +1,13 @@
+// { dg-additional-options "-w" }
+enum Foo {
+    A,
+    B,
+}
+
+fn inspect(f: Foo, g: u8) {
+    match (f, g) {
+        (Foo::A, 1) => {}
+        (Foo::B, 2) => {}
+        _ => {}
+    }
+}