Add a test for slice patterns

Author: topecongiro

tests/source/pattern.rs

@@ -63,3 +63,11 @@ fn combine_patterns() {
         _ => return,
     };
 }
+
+fn slice_patterns() {
+    match b"123" {
+        [0, ..] => {}
+        [0, foo..] => {}
+        _ => {}
+    }
+}

tests/target/pattern.rs

@@ -75,3 +75,11 @@ fn combine_patterns() {
         _ => return,
     };
 }
+
+fn slice_patterns() {
+    match b"123" {
+        [0, ..] => {}
+        [0, foo..] => {}
+        _ => {}
+    }
+}