Added throw-verification-error instruction.

This is for the deferred verifier error reporting.  It replaces OP_UNUSED_ED.
The instructions aren't actually used yet, which is good since the x86
version hasn't been written yet.

The mterp regen also pushed out some recent-ish changes that hadn't
propagated to the armv4t sources.
diff --git a/vm/analysis/DexOptimize.h b/vm/analysis/DexOptimize.h
index 27ab327..c07dea1 100644
--- a/vm/analysis/DexOptimize.h
+++ b/vm/analysis/DexOptimize.h
@@ -41,7 +41,7 @@
  */
 typedef enum VerifyError {
     VERIFY_ERROR_NONE = 0,      /* no error; must be zero */
-    VERIFY_ERROR_GENERIC,       /* failed, details not important */
+    VERIFY_ERROR_GENERIC,       /* VerifyError */
 
     VERIFY_ERROR_NO_CLASS,      /* NoClassDefFoundError */
     VERIFY_ERROR_NO_METHOD,     /* NoSuchMethodError */