set up nalgebra benchmark

clean build times
- cargo check: 10.2s
- cargo build: 10.9s
- cargo build --release: 13.6s

leaf crate build times:
- check full: 4.9s
- debug full: 5.4s
- opt full: 7.6s

collector/compile-benchmarks/nalgebra-0.33.0/.gitignore

@@ -4,7 +4,6 @@ doc
 lib
 TODO
 target/
-Cargo.lock
 *.orig
 *.swo
 site/

collector/compile-benchmarks/nalgebra-0.33.0/0-println.patch

@@ -0,0 +1,12 @@
+diff --git a/src/base/matrix.rs b/src/base/matrix.rs
+index 6f358a84..6c4eb739 100644
+--- a/src/base/matrix.rs
++++ b/src/base/matrix.rs
+@@ -225,6 +225,7 @@ where
+     S: Default,
+ {
+     fn default() -> Self {
++        println!("testing");
+         Matrix {
+             data: Default::default(),
+             _phantoms: PhantomData,