[AIX][ZOS] Disable tests due to lack of Objective-C support

AIX and z/OS lack Objective-C support, so mark these tests as unsupported for AIX and z/OS.

This patch follows the same reasoning as D109060.

Reviewed By: jsji

Differential Revision: https://reviews.llvm.org/D112390

clang/test/Modules/ModuleDebugInfo.cpp

@@ -1,3 +1,4 @@
+// UNSUPPORTED: -zos, -aix
 // Test that (the same) debug info is emitted for an Objective-C++
 // module and a C++ precompiled header.
 

clang/test/Modules/ModuleDebugInfo.m

@@ -1,3 +1,4 @@
+// UNSUPPORTED: -zos, -aix
 // Test that debug info is emitted for an Objective-C module and
 // a precompiled header.
 

clang/test/Modules/clang_module_file_info.m

@@ -1,4 +1,4 @@
-
+// UNSUPPORTED: -zos, -aix
 @import DependsOnModule;
 
 // RUN: rm -rf %t %t-obj

clang/test/Modules/debug-info-moduleimport-in-module.m

@@ -1,3 +1,4 @@
+// UNSUPPORTED: -zos, -aix
 // Test that an @import inside a module is not represented in the debug info.
 
 // REQUIRES: asserts

clang/test/Modules/module-debuginfo-prefix.m

@@ -1,3 +1,4 @@
+// UNSUPPORTED: -zos, -aix
 // REQUIRES: asserts
 
 // Modules:

llvm/test/DebugInfo/X86/objc_direct.ll

@@ -1,3 +1,4 @@
+; UNSUPPORTED: -zos, -aix
 ; RUN: llc < %s -filetype=obj -o %t
 ; RUN: llvm-dwarfdump -v %t | FileCheck %s