Allow rust code in external/rust.

Test: mm in all rust enabled directories
Change-Id: I3454c840adb7a9823637f0ae874355e4df995b66
diff --git a/rust/config/whitelist.go b/rust/config/whitelist.go
index 4646264..8025bcf 100644
--- a/rust/config/whitelist.go
+++ b/rust/config/whitelist.go
@@ -2,7 +2,7 @@
 
 var (
 	RustAllowedPaths = []string{
-		"external/rust/crates",
+		"external/rust",
 		"external/crosvm",
 		"external/adhd",
 	}