E0101 needs to be updated to new format

[sophiajt]

From: src/test/compile-fail/E0101.rs

Error E0101 needs a span_label, updating it from:

error[E0101]: cannot determine a type for this expression: unconstrained type
  --> src/test/compile-fail/E0101.rs:12:13
   |
12 |     let x = |_| {}; //~ ERROR E0101
   |             ^^^^^^

To:

error[E0101]: cannot determine a type for this expression: unconstrained type
  --> src/test/compile-fail/E0101.rs:12:13
   |
12 |     let x = |_| {}; //~ ERROR E0101
   |             ^^^^^^ cannot resolve type of expression