Provide metadata to validator to allow faster caching.

src/trusted/validator_ragel/dfa_validate_64.c

Index: src/trusted/validator_ragel/dfa_validate_64.c
diff --git a/src/trusted/validator_ragel/dfa_validate_64.c b/src/trusted/validator_ragel/dfa_validate_64.c
index 22813634f6cb1ba06fb73839c26eebc07e8aaaf5..4b744143bccebf9a0af32bb26e1da1535d8e55ea 100644
--- a/src/trusted/validator_ragel/dfa_validate_64.c
+++ b/src/trusted/validator_ragel/dfa_validate_64.c
@@ -30,11 +30,13 @@ static NaClValidationStatus ApplyDfaValidator_x86_64(
     int stubout_mode,
     int readonly_text,
     const NaClCPUFeatures *f,
+    const struct NaClValidationMetadata *metadata,
     struct NaClValidationCache *cache) {
   /* TODO(jfb) Use a safe cast here. */
   NaClCPUFeaturesX86 *cpu_features = (NaClCPUFeaturesX86 *) f;
   enum NaClValidationStatus status = NaClValidationFailed;
   UNREFERENCED_PARAMETER(guest_addr);
+  UNREFERENCED_PARAMETER(metadata);
   UNREFERENCED_PARAMETER(cache);
 
   if (stubout_mode)