Fix resolution tests

Author: emberian

src/test/compile-fail/issue-2123.rs

@@ -9,6 +9,7 @@
 // except according to those terms.
 
 use x = m::f; //~ ERROR failed to resolve import
+              //~^ unresolved import: there is no `f` in `m`
 
 mod m {
 }

src/test/compile-fail/issue-2937.rs

@@ -9,6 +9,7 @@
 // except according to those terms.
 
 use x = m::f; //~ ERROR failed to resolve import
+              //~^ ERROR unresolved import: there is no `f` in `m`
 
 mod m {
 }

src/test/compile-fail/issue-3993-2.rs

@@ -9,6 +9,7 @@
 // except according to those terms.
 
 use zoo::{duck, goose}; //~ ERROR failed to resolve import
+                        //~^ ERROR unresolved import: found `goose` in `zoo` but it is private
 
 mod zoo {
     pub enum bird {

src/test/compile-fail/issue-3993-3.rs

@@ -9,6 +9,7 @@
 // except according to those terms.
 
 use zoo::fly; //~ ERROR failed to resolve import
+              //~^ ERROR unresolved import: found `fly` in `zoo` but it is private
 
 mod zoo {
     priv type fly = ();

src/test/compile-fail/issue-3993.rs

@@ -9,6 +9,7 @@
 // except according to those terms.
 
 use zoo::fly; //~ ERROR failed to resolve import
+              //~^ ERROR unresolved import: found `fly` in `zoo` but it is private
 
 mod zoo {
     priv fn fly() {}

src/test/compile-fail/super-at-top-level.rs

@@ -1,5 +1,4 @@
-use super::f;   //~ ERROR unresolved name
-//~^ ERROR failed to resolve import
+use super::f; //~ ERROR failed to resolve import
 
 fn main() {
 }