Update testsuite to match new panic msg

This patch fixes tests from failing that were matching on `Box<Any>`,
which was the old panic message. Since the new panic message is `Box<dyn
Any>`, the tests have been updated to match against this instead.

src/test/ui/panics/panic-macro-any-wrapped.rs

@@ -1,5 +1,5 @@
 // run-fail
-// error-pattern:panicked at 'Box<Any>'
+// error-pattern:panicked at 'Box<dyn Any>'
 // ignore-emscripten no processes
 
 #![allow(non_fmt_panic)]

src/test/ui/panics/panic-macro-any.rs

@@ -1,5 +1,5 @@
 // run-fail
-// error-pattern:panicked at 'Box<Any>'
+// error-pattern:panicked at 'Box<dyn Any>'
 // ignore-emscripten no processes
 
 #![feature(box_syntax)]