Implement System.arraycopy intrinsic for arm.

Change-Id: I58ae1af5103e281fe59fbe022b718d6d8f293a5e
diff --git a/compiler/utils/arm/assembler_thumb2.h b/compiler/utils/arm/assembler_thumb2.h
index a1a8927..cfed0ca 100644
--- a/compiler/utils/arm/assembler_thumb2.h
+++ b/compiler/utils/arm/assembler_thumb2.h
@@ -337,6 +337,8 @@
                              uint32_t immediate,
                              ShifterOperand* shifter_op) OVERRIDE;
 
+  bool ShifterOperandCanAlwaysHold(uint32_t immediate) OVERRIDE;
+
 
   static bool IsInstructionForExceptionHandling(uintptr_t pc);