Move CPU features into its own static library.

src/trusted/cpu_features/arch/mips/cpu_mips.c

Index: src/trusted/cpu_features/arch/mips/cpu_mips.c
diff --git a/src/trusted/validator_mips/cpuid_mips.c b/src/trusted/cpu_features/arch/mips/cpu_mips.c
similarity index 91%
rename from src/trusted/validator_mips/cpuid_mips.c
rename to src/trusted/cpu_features/arch/mips/cpu_mips.c
index b5b04a52f83d11da96264a0a6f8676bde13f8e11..7c17009aa95b7e9153b2f5915523be2519c5c501 100644
--- a/src/trusted/validator_mips/cpuid_mips.c
+++ b/src/trusted/cpu_features/arch/mips/cpu_mips.c
@@ -7,13 +7,13 @@
 #include <string.h>
 
 #include "native_client/src/shared/platform/nacl_log.h"
-#include "native_client/src/trusted/validator_mips/cpuid_mips.h"
+#include "native_client/src/trusted/cpu_features/arch/mips/cpu_mips.h"
 
 
 void NaClSetAllCPUFeaturesMips(NaClCPUFeatures *f) {
   /* TODO(jfb) Use a safe cast in this interface. */
   NaClCPUFeaturesMips *features = (NaClCPUFeaturesMips *) f;
-  /* Pedantic: avoid using memset, as in x86's nacl_cpuid.c. */
+  /* Pedantic: avoid using memset, as in x86's cpu_x86.c. */
   int id;
   /* Ensure any padding is zeroed. */
   NaClClearCPUFeaturesMips(features);
@@ -66,7 +66,7 @@ void NaClSetCPUFeatureMips(NaClCPUFeaturesMips *f, NaClCPUFeatureMipsID id,
 const char *NaClGetCPUFeatureMipsName(NaClCPUFeatureMipsID id) {
   static const char *kFeatureMipsNames[NaClCPUFeatureMips_Max] = {
 # define NACL_MIPS_CPU_FEATURE(name) NACL_TO_STRING(name),
-# include "native_client/src/trusted/validator_mips/cpuid_mips_features.h"
+# include "native_client/src/trusted/cpu_features/arch/mips/cpu_mips_features.h"
 # undef NACL_MIPS_CPU_FEATURE
   };
   return ((unsigned)id < NaClCPUFeatureMips_Max) ?