Upgrade rust/crates/proc-macro-hack to 0.5.19

Test: make
Change-Id: I3ca9b7f663f7fa6b81473e30e37940593c0c4af9
diff --git a/tests/ui/unexpected-arg.rs b/tests/ui/unexpected-arg.rs
new file mode 100644
index 0000000..376fc0d
--- /dev/null
+++ b/tests/ui/unexpected-arg.rs
@@ -0,0 +1,8 @@
+use proc_macro_hack::proc_macro_hack;
+
+#[proc_macro_hack(fake_call_site)]
+pub fn my_macro(input: TokenStream) -> TokenStream {
+    unimplemented!()
+}
+
+fn main() {}