[Driver] Add LiteOS and z/OS to ShouldAddDefaultIncludePaths()

[brad]

Summary

LiteOS (OHOS) and z/ZOS already have header path handling in the Driver, so add the OS's to ShouldAddDefaultIncludePaths().

clang/lib/Lex/InitHeaderSearch.cpp

 }
 
 bool InitHeaderSearch::ShouldAddDefaultIncludePaths(
     const llvm::Triple &triple) {
   switch (triple.getOS()) {
   case llvm::Triple::AIX:
   case llvm::Triple::Emscripten:
   case llvm::Triple::FreeBSD:
+  case llvm::Triple::Fuchsia:
+  case llvm::Triple::Haiku:
+  case llvm::Triple::Hurd:
+  case llvm::Triple::Linux:
+  case llvm::Triple::LiteOS:
   case llvm::Triple::NaCl:
   case llvm::Triple::NetBSD:
   case llvm::Triple::OpenBSD:
   case llvm::Triple::PS4:
   case llvm::Triple::PS5:
-  case llvm::Triple::Fuchsia:
-  case llvm::Triple::Haiku:
-  case llvm::Triple::Hurd:
-  case llvm::Triple::Linux:
   case llvm::Triple::Solaris:
   case llvm::Triple::WASI:
+  case llvm::Triple::ZOS:
     return false;
 
   case llvm::Triple::Win32:
     if (triple.getEnvironment() != llvm::Triple::Cygnus ||
         triple.isOSBinFormatMachO())
       return false;
     break;