[test] Introduced tests of the playground transform and defer and nested functions.

Author: cwakamo

test/PlaygroundTransform/defer.swift

@@ -0,0 +1,20 @@
+// RUN: %empty-directory(%t)
+// RUN: cp %s %t/main.swift
+// RUN: %target-build-swift -Xfrontend -playground -Xfrontend -debugger-support -o %t/main %S/Inputs/PlaygroundsRuntime.swift %t/main.swift
+// RUN: %target-run %t/main | %FileCheck %s
+// RUN: %target-build-swift -Xfrontend -pc-macro -Xfrontend -playground -Xfrontend -debugger-support -o %t/main %S/Inputs/PlaygroundsRuntime.swift %S/Inputs/SilentPCMacroRuntime.swift %t/main.swift
+// RUN: %target-run %t/main | %FileCheck %s
+// REQUIRES: executable_test
+func foo() {
+	defer {
+		2
+	}
+	1
+}
+foo()
+// CHECK: {{.*}} $builtin_log_scope_entry
+// CHECK-NEXT: {{.*}} $builtin_log[='1']
+// CHECK-NEXT: {{.*}} $builtin_log_scope_exit
+// CHECK-NEXT: {{.*}} $builtin_log_scope_entry
+// CHECK-NEXT: {{.*}} $builtin_log[='2']
+// CHECK-NEXT: {{.*}} $builtin_log_scope_exit