Exit command_buffer_push_constants_test on executable preparation failure

runtime/src/iree/hal/cts/command_buffer_push_constants_test.h

diff --git a/runtime/src/iree/hal/cts/command_buffer_push_constants_test.h b/runtime/src/iree/hal/cts/command_buffer_push_constants_test.h
index 59e5325..2a8d5a0 100644
--- a/runtime/src/iree/hal/cts/command_buffer_push_constants_test.h
+++ b/runtime/src/iree/hal/cts/command_buffer_push_constants_test.h
@@ -78,7 +78,7 @@
 };
 
 TEST_P(command_buffer_push_constants_test, DispatchWithPushConstants) {
-  PrepareExecutable();
+  ASSERT_NO_FATAL_FAILURE(PrepareExecutable());
 
   iree_hal_command_buffer_t* command_buffer = NULL;
   IREE_ASSERT_OK(iree_hal_command_buffer_create(