Update compile-fail test error messages

Author: notriddle

src/test/compile-fail/fn-item-type.rs

@@ -33,8 +33,8 @@ fn main() {
     eq(bar::<String>, bar::<Vec<u8>>);
     //~^ ERROR mismatched types
     //~|  expected type `fn(isize) -> isize {bar::<std::string::String>}`
-    //~|  found type `fn(isize) -> isize {bar::<std::vec::Vec<u8>>}`
-    //~|  expected struct `std::string::String`, found struct `std::vec::Vec`
+    //~|  found type `fn(isize) -> isize {bar::<std::collections::Vec<u8>>}`
+    //~|  expected struct `std::string::String`, found struct `std::collections::Vec`
 
     // Make sure we distinguish between trait methods correctly.
     eq(<u8 as Foo>::foo, <u16 as Foo>::foo);

src/test/compile-fail/issue-24819.rs

@@ -14,7 +14,7 @@ fn main() {
     let mut v = Vec::new();
     foo(&mut v);
     //~^ ERROR mismatched types
-    //~| expected struct `std::collections::HashSet`, found struct `std::vec::Vec`
+    //~| expected struct `std::collections::HashSet`, found struct `std::collections::Vec`
 }
 
 fn foo(h: &mut HashSet<u32>) {

src/test/compile-fail/on-unimplemented/on-trait.rs

@@ -33,7 +33,7 @@ pub fn main() {
     let x = vec!(1u8, 2, 3, 4);
     let y: Option<Vec<u8>> = collect(x.iter()); // this should give approximately the same error for x.iter().collect()
     //~^ ERROR
-    //~^^ NOTE a collection of type `std::option::Option<std::vec::Vec<u8>>` cannot be built from an iterator over elements of type `&u8`
+    //~^^ NOTE a collection of type `std::option::Option<std::collections::Vec<u8>>` cannot be built from an iterator over elements of type `&u8`
     //~^^^ NOTE required by `collect`
     let x: String = foobar(); //~ ERROR
     //~^ NOTE test error `std::string::String` with `u8` `_` `u32`