Use ignore-freebsd for tests broken on FreeBSD

Author: brson

src/test/compile-fail/issue-5806.rs

@@ -18,7 +18,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// ignore-test FIXME #12460
+// ignore-freebsd FIXME #12460
 
 #[path = "../compile-fail"]
 mod foo; //~ ERROR: illegal operation on a directory

src/test/run-pass/class-cast-to-trait.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// ignore-test FIXME fails on BSD
+// ignore-freebsd FIXME fails on BSD
 
 #[feature(managed_boxes)];