Move CPU features into its own static library.

src/trusted/validator/x86/nacl_xgetbv.S

Index: src/trusted/validator/x86/nacl_xgetbv.S
diff --git a/src/trusted/validator/x86/nacl_xgetbv.S b/src/trusted/validator/x86/nacl_xgetbv.S
deleted file mode 100644
index 4c861fcb4ffafbc896e1c0b28397cb7e9fd9a0c1..0000000000000000000000000000000000000000
--- a/src/trusted/validator/x86/nacl_xgetbv.S
+++ /dev/null
@@ -1,31 +0,0 @@
-/*
- * Copyright (c) 2012 The Native Client Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-/*
- * This exists only because Windows 64 doesn't support trivial inline assembly.
- * Visual Studio 2010 SP1 has an intrinsic _xgetbv() for this.
- * But earlier versions do not.
- */
-
-#include "native_client/src/trusted/service_runtime/nacl_config.h"
-
-        .text
-
-DEFINE_GLOBAL_HIDDEN_IDENTIFIER(NaClXGETBV):
-#if NACL_BUILD_SUBARCH == 32
-        movl 4(%esp), %ecx
-#elif !NACL_WINDOWS
-        movl %edi, %ecx
-#endif
-        /*
-         * This is "xgetbv" (no operands).  Some assemblers don't know it yet.
-         */
-        .byte 0x0f, 0x01, 0xd0
-#if NACL_BUILD_SUBARCH == 64
-        shlq $32, %rdx
-        orq %rdx, %rax
-#endif
-        ret