[lld] [llvm] [lld][llvm-objcopy] Enable Xbox subsystem for PE images. (PR #191779)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- lld/COFF/DriverUtils.cpp llvm/tools/llvm-objcopy/ObjcopyOptions.cpp --diff_from_common_commit
``````````

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``````````diff
diff --git a/lld/COFF/DriverUtils.cpp b/lld/COFF/DriverUtils.cpp
index fa9bd0093..3b69a6d9b 100644
--- a/lld/COFF/DriverUtils.cpp
+++ b/lld/COFF/DriverUtils.cpp
@@ -122,18 +122,19 @@ void LinkerDriver::parseSubsystem(StringRef arg, WindowsSubsystem *sys,
   auto [sysStr, ver] = arg.split(',');
   std::string sysStrLower = sysStr.lower();
   *sys = StringSwitch<WindowsSubsystem>(sysStrLower)
-    .Case("boot_application", IMAGE_SUBSYSTEM_WINDOWS_BOOT_APPLICATION)
-    .Case("console", IMAGE_SUBSYSTEM_WINDOWS_CUI)
-    .Case("default", IMAGE_SUBSYSTEM_UNKNOWN)
-    .Case("efi_application", IMAGE_SUBSYSTEM_EFI_APPLICATION)
-    .Case("efi_boot_service_driver", IMAGE_SUBSYSTEM_EFI_BOOT_SERVICE_DRIVER)
-    .Case("efi_rom", IMAGE_SUBSYSTEM_EFI_ROM)
-    .Case("efi_runtime_driver", IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER)
-    .Case("native", IMAGE_SUBSYSTEM_NATIVE)
-    .Case("posix", IMAGE_SUBSYSTEM_POSIX_CUI)
-    .Case("windows", IMAGE_SUBSYSTEM_WINDOWS_GUI)
-    .Case("xbox", IMAGE_SUBSYSTEM_XBOX)
-    .Default(IMAGE_SUBSYSTEM_UNKNOWN);
+             .Case("boot_application", IMAGE_SUBSYSTEM_WINDOWS_BOOT_APPLICATION)
+             .Case("console", IMAGE_SUBSYSTEM_WINDOWS_CUI)
+             .Case("default", IMAGE_SUBSYSTEM_UNKNOWN)
+             .Case("efi_application", IMAGE_SUBSYSTEM_EFI_APPLICATION)
+             .Case("efi_boot_service_driver",
+                   IMAGE_SUBSYSTEM_EFI_BOOT_SERVICE_DRIVER)
+             .Case("efi_rom", IMAGE_SUBSYSTEM_EFI_ROM)
+             .Case("efi_runtime_driver", IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER)
+             .Case("native", IMAGE_SUBSYSTEM_NATIVE)
+             .Case("posix", IMAGE_SUBSYSTEM_POSIX_CUI)
+             .Case("windows", IMAGE_SUBSYSTEM_WINDOWS_GUI)
+             .Case("xbox", IMAGE_SUBSYSTEM_XBOX)
+             .Default(IMAGE_SUBSYSTEM_UNKNOWN);
   if (*sys == IMAGE_SUBSYSTEM_UNKNOWN && sysStrLower != "default")
     Fatal(ctx) << "unknown subsystem: " << sysStr;
   if (!ver.empty())

``````````

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https://github.com/llvm/llvm-project/pull/191779