Auto merge of #146982 - fmease:fix-rmake-linker-warning, r=<try>

Make normalization step in `tests/run-make/linker-warning` more robust

try-job: x86_64-gnu

Author: rust-bors[bot]

tests/run-make/linker-warning/rmake.rs

@@ -61,7 +61,7 @@ fn main() {
         diff()
             .expected_file("short-error.txt")
             .actual_text("(linker error)", out.stderr())
-            .normalize(r#"/rustc[^/_-]*/"#, "/rustc/")
+            .normalize(r#"^/rustc[^/_-]*/"#, "/rustc/")
             .normalize("libpanic_abort", "libpanic_unwind")
             .normalize(
                 regex::escape(