Allow writing Rust fuzzers for third-party crates.

These would ideally be upstreamed, but until then we can host them here.

Test: Run fuzzers.
Change-Id: Ie1bfd8ce6dffeaa211b85cd6340dfb435ab83c71
diff --git a/rust/config/allowed_list.go b/rust/config/allowed_list.go
index 47ca3a7..b113573 100644
--- a/rust/config/allowed_list.go
+++ b/rust/config/allowed_list.go
@@ -32,6 +32,7 @@
 		"system/security",
 		"system/tools/aidl",
 		"tools/security/fuzzing/example_rust_fuzzer",
+		"tools/security/fuzzing/orphans",
 		"vendor/",
 	}