Add benchmarking infrastructure for bitmaps-3.1.0.

Author: nnethercote

collector/benchmarks/README.md

@@ -15,6 +15,7 @@ There are three categories of benchmarks, **Primary**, **Secondary**, and
 These are real programs that are important in some way, and worth tracking.
 They mostly consist of real-world crates.
 
+- **bitmaps-3.1.0**: A bitmaps implementation. Stresses code handling traits.
 - **cargo-0.60.0**: The Rust package manager. A large program, and an important
   one in the Rust ecosystem.
 - **clap-3.1.6**: A command line argument parser. A crate used by many Rust

collector/benchmarks/bitmaps-3.1.0/0-println.patch

@@ -0,0 +1,12 @@
+diff --git a/src/bitmap.rs b/src/bitmap.rs
+index ba5d1b18..9542a890 100644
+--- a/src/bitmap.rs
++++ b/src/bitmap.rs
+@@ -27,6 +27,7 @@ where
+     BitsImpl<{ SIZE }>: Bits,
+ {
+     fn clone(&self) -> Self {
++        println!("testing");
+         Bitmap::from_value(self.data)
+     }
+ }

collector/benchmarks/bitmaps-3.1.0/Cargo.toml

@@ -31,3 +31,5 @@ version = "0.3.0"
 [features]
 default = ["std"]
 std = []
+
+[workspace]