Implemented ABS vectorization.

Rationale:
This CL adds the concept of vectorizing intrinsics
to the ART vectorizer. More can follow (MIN, MAX, etc).

Test: test-art-host, test-art-target (angler)
Change-Id: Ieed8aa83ec64c1250ac0578570249cce338b5d36
diff --git a/compiler/optimizing/nodes.h b/compiler/optimizing/nodes.h
index 52a02c2..671f950 100644
--- a/compiler/optimizing/nodes.h
+++ b/compiler/optimizing/nodes.h
@@ -1374,6 +1374,7 @@
   M(VecSumReduce, VecUnaryOperation)                                    \
   M(VecCnv, VecUnaryOperation)                                          \
   M(VecNeg, VecUnaryOperation)                                          \
+  M(VecAbs, VecUnaryOperation)                                          \
   M(VecNot, VecUnaryOperation)                                          \
   M(VecAdd, VecBinaryOperation)                                         \
   M(VecSub, VecBinaryOperation)                                         \
@@ -4224,6 +4225,10 @@
     dispatch_info_ = dispatch_info;
   }
 
+  DispatchInfo GetDispatchInfo() const {
+    return dispatch_info_;
+  }
+
   void AddSpecialInput(HInstruction* input) {
     // We allow only one special input.
     DCHECK(!IsStringInit() && !HasCurrentMethodInput());