[embedded] Use 'REQUIRES: swift_test_mode_optimize_none' in executable trap tests

Author: kubamracek

test/embedded/traps-fatalerror-exec.swift

@@ -20,6 +20,7 @@
 // REQUIRES: executable_test
 // REQUIRES: optimized_stdlib
 // REQUIRES: OS=macosx
+// REQUIRES: swift_test_mode_optimize_none
 
 func test() {
      fatalError("task failed successfully")

test/embedded/traps-precondition-exec.swift

@@ -20,6 +20,7 @@
 // REQUIRES: executable_test
 // REQUIRES: optimized_stdlib
 // REQUIRES: OS=macosx
+// REQUIRES: swift_test_mode_optimize_none
 
 func test(i: Int) {
      precondition(i == 0, "task failed successfully")

test/embedded/traps-preconditionfailure-exec.swift

@@ -20,6 +20,7 @@
 // REQUIRES: executable_test
 // REQUIRES: optimized_stdlib
 // REQUIRES: OS=macosx
+// REQUIRES: swift_test_mode_optimize_none
 
 func test() {
      preconditionFailure("task failed successfully")