Update rules_rust

Several changes I made in 971-Robot-Code first have been upstreamed,
including finished a few pieces that I now want to use.

Change-Id: Iac6317989c1d3a0c7886c7d4a5798c6dbcedf2a9
Signed-off-by: Brian Silverman <bsilver16384@gmail.com>
diff --git a/tools/lint/BUILD b/tools/lint/BUILD
index 55cccff..fedead2 100644
--- a/tools/lint/BUILD
+++ b/tools/lint/BUILD
@@ -15,7 +15,7 @@
     name = "rustfmt",
     srcs = ["rustfmt.sh"],
     data = [
-        "@rust//:rustfmt",
+        "@rust__x86_64-unknown-linux-gnu_tools//:rustfmt",
     ],
     deps = [
         "@bazel_tools//tools/bash/runfiles",