tools: Fix rustfmt and the RLS

These tools have been corrected in their upstream repo's, and the
submodules have been updated here to reflect that. I also had to update
Cargo to match what the RLS is expecting.

The tool states for `rustfmt` and `rls` where both changed from "Broken"
to "Testing" in this commit, thus enabling testing and distribution
again.

1 files changed, 5 insertions, 19 deletions

diff --git a/src/tools/rustfmt b/src/tools/rustfmt
-Subproject cf0d494dda7447bacaab743a70c47e28bea55c6
+Subproject 51b03c3aaf5e69afbb7508e566c5da2bf0bc366