Rollup merge of rust-lang#102543 - daym:patch-1, r=joshtriplett

Remove "execute" bit from lock file permissions

Previously, flock would set the "execute" bit on Rust lock files. That makes no sense.

This patch clears the "execute" bit on Rust lock files.

See issue rust-lang#102531.

Author: Dylan-DPC

compiler/rustc_data_structures/src/flock/linux.rs

@@ -18,7 +18,7 @@ impl Lock {
             .read(true)
             .write(true)
             .create(create)
-            .mode(libc::S_IRWXU as u32)
+            .mode(0o600)
             .open(p)?;
 
         let mut operation = if exclusive { libc::LOCK_EX } else { libc::LOCK_SH };