[build] //zircon/public/fidl --> //zircon/system/fidl

Bug: 3367
Change-Id: If134d5f5b5fa6c42a5cdbd9916c6d524c78144f1
diff --git a/BUILD.gn b/BUILD.gn
index a720e3f..a702452 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -121,7 +121,7 @@
     "//zircon/public/lib/fdio",
   ]
   public_deps = [
-    "//zircon/public/fidl/fuchsia.hardware.pty:fuchsia.hardware.pty_c",
+    "//zircon/system/fidl/fuchsia-hardware-pty:fuchsia-hardware-pty_c",
   ]
 }