inlinable_bitfields.swift does not work on i386 and armv7k

rdar://46486435

Author: aschwaighofer

test/ClangImporter/inlinable_bitfields.swift

@@ -2,6 +2,9 @@
 // RUN: %target-swift-frontend %clang-importer-sdk %S/Inputs/inlinable_bitfields_other.swift -emit-module -emit-module-path %t/inlinable_bitfields_other.swiftmodule
 // RUN: %target-swift-frontend %clang-importer-sdk -I %t %s -emit-ir -disable-llvm-optzns -O | %FileCheck %s -DINT=i%target-ptrsize
 
+// rdar://46486435
+// REQUIRES: CPU=x86_64
+
 import inlinable_bitfields_other
 
 public func g(_ m: MM) -> UInt32 {