Bump backtrace-rs to enable Mach-O support on iOS.

cutsoy · cutsoy · commit 4e3257d5fefc · 2020-10-23T13:47:09.000+02:00
diff --git a/backtrace b/backtrace
@@ -1 +1 @@
-Subproject commit a6dd47bd588c882e735675a1379d2b61719fa380
+Subproject commit 8b8ea53b56f519dd7780defdd4254daaec892584

Original file line number	Diff line number	Diff line change
`@@ -1 +1 @@`
`1`		`-Subproject commit a6dd47bd588c882e735675a1379d2b61719fa380`
	`1`	`+Subproject commit 8b8ea53b56f519dd7780defdd4254daaec892584`