Min/max SIMDization support.

Rationale:
The more vectorized, the better!

Test: test-art-target, test-art-host

Change-Id: I758becca5beaa5b97fab2ab70f2e00cb53458703
diff --git a/compiler/optimizing/loop_optimization.h b/compiler/optimizing/loop_optimization.h
index 4a7da86..6d5978d 100644
--- a/compiler/optimizing/loop_optimization.h
+++ b/compiler/optimizing/loop_optimization.h
@@ -71,6 +71,7 @@
     kNoSignedHAdd    = 32,   // no signed halving add
     kNoUnroundedHAdd = 64,   // no unrounded halving add
     kNoAbs           = 128,  // no absolute value
+    kNoMinMax        = 256,  // no min/max
   };
 
   /*