[test] Fix test failure on non x86_64 target in failed-clang-module test case

Author: rintaro

test/Serialization/failed-clang-module.swift

@@ -9,11 +9,13 @@
 // RUN: mkdir -p %t/MixModA.framework/Modules/MixModA.swiftmodule
 // RUN: cp %S/Inputs/MixModA.modulemap %t/MixModA.framework/Modules/module.modulemap
 
-// RUN: %target-swift-frontend -emit-module %S/Inputs/SwiftModA.swift -module-name MixModA -I %S/Inputs/objcfail -o %t/MixModA.framework/Modules/MixModA.swiftmodule/x86_64.swiftmodule -emit-objc-header -emit-objc-header-path %t/MixModA.framework/Headers/MixModA-Swift.h -module-cache-path %t/mcp
+// RUN: %target-swift-frontend -emit-module %S/Inputs/SwiftModA.swift -module-name MixModA -I %S/Inputs/objcfail -o %t/MixModA.framework/Modules/MixModA.swiftmodule/%target-swiftmodule-name -emit-objc-header -emit-objc-header-path %t/MixModA.framework/Headers/MixModA-Swift.h -module-cache-path %t/mcp
 // RUN: %target-swift-frontend -emit-module %S/Inputs/SwiftModB.swift -module-name SwiftModB -F %t -o %t -module-cache-path %t/mcp
 
 // RUN: %target-swift-frontend -parse %s -I %t -module-cache-path %t/mcp
 // RUN: %target-swift-frontend -parse %s -Xcc -DFAIL -I %t -module-cache-path %t/mcp -show-diagnostics-after-fatal -verify
 
+// XFAIL: linux
+
 import SwiftModB // expected-error {{missing required module}}
 _ = TyB() // expected-error {{use of unresolved identifier 'TyB'}}