Fix iOS build

Broken by
https://chromium-review.googlesource.com/c/angle/angle/+/6302912

Bug: b/398048048
Change-Id: I41d7c8b45b42b9fc36fcd761a254f346c7fb2299
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6330716
Reviewed-by: Cody Northrop <cnorthrop@google.com>
Auto-Submit: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Cody Northrop <cnorthrop@google.com>

src/tests/BUILD.gn

@@ -702,7 +702,7 @@ if (build_angle_perftests) {
 if (is_ios) {
   bundle_data("angle_trace_tests_bundle_data") {
     testonly = true
-    sources = [ "angle_trace_tests_expectations.txt" ]
+    sources = [ "perf_tests/angle_trace_tests_expectations.txt" ]
     outputs = [ "{{bundle_resources_dir}}/" +
                 "{{source_root_relative_dir}}/{{source_file_part}}" ]
   }