[test] Skip vmspecific_leaf_call_test in app_jitk

Jobs crash due to missing snapshots, caused by the tests intentionally
crashing.

TEST=-n app_jitk-linux-debug-x64 ffi_2/vmspecific_leaf_call_test

Cq-Include-Trybots: luci.dart.try:app-kernel-linux-debug-x64-try,app-kernel-linux-product-x64-try,app-kernel-linux-release-x64-try
Bug: #46125
Change-Id: Ic62d68e492f6f24cc4ca60151172f89137097398
Cq-Do-Not-Cancel-Tryjobs: true
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/201185
Reviewed-by: Daco Harkes <[email protected]>
Commit-Queue: Clement Skau <[email protected]>

Author: Clement Skau

tests/ffi/ffi.status

@@ -5,6 +5,9 @@
 [ $builder_tag == msan ]
 vmspecific_handle_test: Skip # https://dartbug.com/42314
 
+[ $compiler == app_jitk ]
+vmspecific_leaf_call_test: Skip # https://dartbug.com/46125: Snapshot fails to generate.
+
 [ $mode == debug ]
 function_callbacks_structs_by_value_generated_test: Pass, Slow
 

tests/ffi_2/ffi_2.status

@@ -5,6 +5,9 @@
 [ $builder_tag == msan ]
 vmspecific_handle_test: Skip # https://dartbug.com/42314
 
+[ $compiler == app_jitk ]
+vmspecific_leaf_call_test: Skip # https://dartbug.com/46125: Snapshot fails to generate.
+
 [ $mode == debug ]
 function_callbacks_structs_by_value_generated_test: Pass, Slow