Explicitly depend on mtl_with_mojo

Change-Id: Icea0202ef70c2729883ea6796bcbd98acbc2e486
diff --git a/wpa_supplicant/BUILD.gn b/wpa_supplicant/BUILD.gn
index 62fe29e..f73ccce 100644
--- a/wpa_supplicant/BUILD.gn
+++ b/wpa_supplicant/BUILD.gn
@@ -97,7 +97,7 @@
 
   deps = [
     "//lib/ftl",
-    "//lib/mtl",
+    "//lib/mtl:mtl_with_mojo",
     "//mojo/system",
   ]
 }