[rust] Suppress tests/codegen/iter-repeat-n-trivial-drop.rs test failure

The failure is benign. Exclude it for now to unblock rust packaging.

Bug: 324853415
Change-Id: Ia2e11e0aae08cca9fb7eaaa8a659486e729e198a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5287036
Reviewed-by: Steinar H Gunderson <sesse@chromium.org>
Commit-Queue: Steinar H Gunderson <sesse@chromium.org>
Commit-Queue: Hans Wennborg <hans@chromium.org>
Auto-Submit: Hans Wennborg <hans@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1259738}
NOKEYCHECK=True
GitOrigin-RevId: 56deb9fe7f4f13f0d0abcb6df04684a86c96e4d7
diff --git a/build_rust.py b/build_rust.py
index bae110a..7ab61cc 100755
--- a/build_rust.py
+++ b/build_rust.py
@@ -75,6 +75,8 @@
     os.path.join('tests', 'codegen', 'abi-main-signature-32bit-c-int.rs'),
     # TODO(https://crbug.com/1513478): remove after rolling rust with fix
     os.path.join('tests', 'ui', 'asm', 'inline-syntax.rs'),
+    # TODO(https://crbug.com/324853415): benign failure; remove when fixed.
+    os.path.join('tests', 'codegen', 'iter-repeat-n-trivial-drop.rs'),
 ]
 EXCLUDED_TESTS_WINDOWS = [
     # https://github.com/rust-lang/rust/issues/96464