Make sure that generics are internalized in executables even with -Zshare-generics

src/test/codegen/local-generics-in-exe-internalized.rs

+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// compile-flags: -C no-prepopulate-passes -Zshare-generics=yes
+
+// Check that local generics are internalized if they are in the same CGU
+
+// CHECK: define internal {{.*}} @_ZN34local_generics_in_exe_internalized3foo{{.*}}
+pub fn foo<T>(x: T, y: T) -> (T, T) {
+    (x, y)
+}
+
+fn main() {
+    let _ = foo(0u8, 1u8);
+}