COMPMID-617: Add validation functions.

Added validation routines to the following kernels.
-CLActivationLayer
-CLBatchNormalizationLayer
-CLArithmeticAddition
-CLArithmeticSubtraction
-CLPixelwiseMultiplication

Change-Id: I0f3a03154f9e392279f715af656683cd0ad4cef5
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/94595
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
diff --git a/arm_compute/core/Error.h b/arm_compute/core/Error.h
index 6e4aa6a..fa3f9c0 100644
--- a/arm_compute/core/Error.h
+++ b/arm_compute/core/Error.h
@@ -240,7 +240,7 @@
  *
  * @param[in] error Error value to check.
  */
-#define ARM_COMPUTE_ERROR_THROW(error) \
+#define ARM_COMPUTE_ERROR_THROW_ON(error) \
     error.throw_if_error();
 
 /** If the condition is true, the given message is printed and an exception is thrown
@@ -282,7 +282,7 @@
  */
 #define ARM_COMPUTE_CONST_ON_ERROR(cond, val, msg) (cond) ? throw std::logic_error(msg) : val;
 #else /* ARM_COMPUTE_ASSERTS_ENABLED */
-#define ARM_COMPUTE_ERROR_THROW(error)
+#define ARM_COMPUTE_ERROR_THROW_ON(error)
 #define ARM_COMPUTE_ERROR_ON_MSG(cond, ...)
 #define ARM_COMPUTE_ERROR_ON_LOC_MSG(cond, func, file, line, ...)
 #define ARM_COMPUTE_CONST_ON_ERROR(cond, val, msg) val