Rollup merge of rust-lang#84481 - RalfJung:miri, r=RalfJung

Dylan-DPC · web-flow · commit cb196e671397 · 2021-04-25T12:49:51.000+02:00
update Miri

Cc ```@rust-lang/miri``` r? ```@ghost```
diff --git a/src/tools/miri b/src/tools/miri
@@ -1 +1 @@
-Subproject commit a86eab3e6c3d645769bfdb2d09efd84d1e1fcbc0
+Subproject commit 58436e942a9f301748a2d7e88e6184e168cfcfbd
