adding tests for nested and glob use

src/test/ui/lint/lint-pub-unreachable-for-nested-glob.rs

@@ -0,0 +1,28 @@
+// check-pass
+
+#![deny(unreachable_pub)]
+
+pub use self::m1::*;
+
+mod m1 {
+    pub use self::m2::*;
+
+    mod m2 {
+        pub struct Item1;
+        pub struct Item2;
+    }
+}
+
+
+pub use self::o1::{ Item42, Item24 };
+
+mod o1 {
+    pub use self::o2::{ Item42, Item24 };
+
+    mod o2 {
+        pub struct Item42;
+        pub struct Item24;
+    }
+}
+
+fn main() {}