[infra] Mark analysis/package_root_test as flaky on linux

Change-Id: I611aa7bc9b96a8bd322333814dce35f44f61ac0d
Reviewed-on: https://dart-review.googlesource.com/59092
Reviewed-by: William Hesse <whesse@google.com>
diff --git a/pkg/pkg.status b/pkg/pkg.status
index ded000c..1ff41ca 100644
--- a/pkg/pkg.status
+++ b/pkg/pkg.status
@@ -113,6 +113,9 @@
 front_end/test/src/incremental/hot_reload_e2e_test: Skip
 vm/test/*: SkipByDesign # Only meant to run on vm
 
+[ $system == linux ]
+analysis_server/test/integration/analysis/package_root_test: Pass, RuntimeError # Issue 33382
+
 [ $system == windows ]
 front_end/test/fasta/ast_builder_test: Pass, Slow, Timeout
 front_end/test/fasta/bootstrap_test: Skip # Issue 31902