Clean up code to clarify we are only tracking the condition flags of APSR.

src/trusted/validator_arm/validator.cc

Index: src/trusted/validator_arm/validator.cc
===================================================================
--- src/trusted/validator_arm/validator.cc	(revision 8588)
+++ src/trusted/validator_arm/validator.cc	(working copy)
@@ -15,7 +15,7 @@
 using nacl_arm_dec::Register;
 using nacl_arm_dec::RegisterList;
 using nacl_arm_dec::kRegisterNone;
-using nacl_arm_dec::kRegisterFlags;
+using nacl_arm_dec::kConditions;
 using nacl_arm_dec::kRegisterPc;
 using nacl_arm_dec::kRegisterLink;
 
@@ -70,7 +70,7 @@
 
   if (first.defines(second.base_address_register())
       && first.clears_bits(sfi.data_address_mask())
-      && !first.defs()[kRegisterFlags]
+      && !first.defs()[kConditions]
       && first.always_precedes(second)) {
     return PATTERN_SAFE_2;
   }