Mark opaque_result_type_runtime_call.swift as an executable_test

Author: slavapestov

test/Interpreter/opaque_result_type_runtime_call.swift

@@ -5,6 +5,8 @@
 // RUN: %target-codesign %t/main
 // RUN: %target-run %t/main %t/%target-library-name(opaque_result_type_runtime_call_other) | %FileCheck %s
 
+// REQUIRES: executable_test
+
 import opaque_result_type_runtime_call_other
 
 extension String: P {}