COMPMID-2177 Fix clang warnings

Change-Id: I78039db8c58d7b14a042c41e54c25fb9cb509bf7
Signed-off-by: Michalis Spyrou <michalis.spyrou@arm.com>
Reviewed-on: https://review.mlplatform.org/c/1092
Reviewed-by: VidhyaSudhan Loganathan <vidhyasudhan.loganathan@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/arm_compute/runtime/Memory.h b/arm_compute/runtime/Memory.h
index 6f5254a..1a00ed2 100644
--- a/arm_compute/runtime/Memory.h
+++ b/arm_compute/runtime/Memory.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2018 ARM Limited.
+ * Copyright (c) 2017-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -43,7 +43,7 @@
      *
      * @param[in] memory Memory to be imported
      */
-    Memory(std::shared_ptr<IMemoryRegion> memory);
+    Memory(const std::shared_ptr<IMemoryRegion> &memory);
     /** Default Constructor
      *
      * @note Ownership of the memory is not transferred to this object.