Trivial compiler change to inhibit download-rustc in CI

Author: Zalathar

compiler/rustc_mir_transform/src/coverage/mod.rs

@@ -1,8 +1,7 @@
-pub(super) mod query;
-
 mod counters;
 mod graph;
 mod mappings;
+pub(super) mod query;
 mod spans;
 #[cfg(test)]
 mod tests;