Add AArch64 device Rust toolchain.

Bug: 141207434
Test: build example rust device module.
Change-Id: I0932a614942bf4a4d4b6c153fcc4fc79c7f202bd
diff --git a/rust/prebuilt.go b/rust/prebuilt.go
index d4e631b..fa69fbb 100644
--- a/rust/prebuilt.go
+++ b/rust/prebuilt.go
@@ -63,3 +63,8 @@
 
 	return srcPath
 }
+
+func (prebuilt *prebuiltLibraryDecorator) compilerDeps(ctx DepsContext, deps Deps) Deps {
+	deps = prebuilt.baseCompiler.compilerDeps(ctx, deps)
+	return deps
+}