bless mir-opt tests NLL MIR dumps

Author: lqd

tests/mir-opt/nll/region_subtyping_basic.main.nll.0.32bit.mir

@@ -20,6 +20,9 @@
 | '?2: '?3 due to Assignment at Single(bb1[0]) ($DIR/region_subtyping_basic.rs:19:13: 19:18 (#0)
 | '?3: '?4 due to Assignment at Single(bb1[3]) ($DIR/region_subtyping_basic.rs:20:13: 20:14 (#0)
 |
+| Borrows
+| bw0: issued at bb1[0] in '?2
+|
 fn main() -> () {
     let mut _0: ();
     let mut _1: [usize; ValTree(Leaf(0x00000003): usize)];

tests/mir-opt/nll/region_subtyping_basic.main.nll.0.64bit.mir

@@ -20,6 +20,9 @@
 | '?2: '?3 due to Assignment at Single(bb1[0]) ($DIR/region_subtyping_basic.rs:19:13: 19:18 (#0)
 | '?3: '?4 due to Assignment at Single(bb1[3]) ($DIR/region_subtyping_basic.rs:20:13: 20:14 (#0)
 |
+| Borrows
+| bw0: issued at bb1[0] in '?2
+|
 fn main() -> () {
     let mut _0: ();
     let mut _1: [usize; ValTree(Leaf(0x0000000000000003): usize)];

tests/mir-opt/storage_ranges.main.nll.0.mir

@@ -17,6 +17,9 @@
 | '?3 live at {bb0[11]}
 | '?2: '?3 due to Assignment at Single(bb0[10]) ($DIR/storage_ranges.rs:7:17: 7:25 (#0)
 |
+| Borrows
+| bw0: issued at bb0[10] in '?2
+|
 fn main() -> () {
     let mut _0: ();
     let _1: i32;