submodules: update cargo from f534844c2 to cb06cb269

matthiaskrgr · matthiaskrgr · commit 737338e2a5fd · 2020-05-09T00:47:00.000+02:00
Changes:
````
more clippy fixes
Document that bench is unstable in the man page.
Update assertions in LTO calculations
Updated comments in resolve.rs to reflect actual data strcture used.
Try to remove secrets from http.debug.
Revert always computing filename Metadata.
clean -p: call `get_many` once.
Implement new `clean -p` using globs.
Rework how Cargo computes the rustc file outputs.
Add CrateType to replace LibKind.
````
diff --git a/src/tools/cargo b/src/tools/cargo
@@ -1 +1 @@
-Subproject commit f534844c25cacc5e004404cea835ac85e35ca3fd
+Subproject commit cb06cb2696df2567ce06d1a39b1b40612a29f853
