Add test infrastructure for serde_derive-1.0.136.

Author: nnethercote

collector/benchmarks/README.md

@@ -37,6 +37,8 @@ They mostly consist of real-world crates.
 - **ripgrep-13.0.0**: A line-oriented search tool. A widely-used utility.
 - **serde-1.0.136**: A serialization/deserialization crate. Used by many other
   Rust programs.
+- **serde_derive-1.0.136**: A proc-macro sub-crate used by `serde`. Used by
+  many other Rust programs. Stresses declarative macro expansion somewhat.
 - **stm32f4-0.14.0**: A crate that has many thousands of blanket impl blocks.
   It uses cargo features to enable large portions of its structure and is
   built with `--features=stm32f410` to have faster benchmarking times.

collector/benchmarks/serde_derive-1.0.136/0-println.patch

@@ -0,0 +1,13 @@
+diff --git a/src/de.rs b/src/de.rs
+index ff7bc42f..d51d2954 100644
+--- a/src/de.rs
++++ b/src/de.rs
+@@ -17,6 +17,8 @@ use std::ptr;
+ pub fn expand_derive_deserialize(
+     input: &mut syn::DeriveInput,
+ ) -> Result<TokenStream, Vec<syn::Error>> {
++    println!("testing");
++
+     replace_receiver(input);
+ 
+     let ctxt = Ctxt::new();

collector/benchmarks/serde_derive-1.0.136/Cargo.toml

@@ -42,3 +42,5 @@ version = "1.0"
 [features]
 default = []
 deserialize_in_place = []
+
+[workspace]