COMPMID-417 - Added arm_compute comment at the end of NEON header files

Change-Id: I288f409c8f51fac7ceb7b3f301105a74ffc737fd
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/88785
Reviewed-by: Moritz Pflanzer <moritz.pflanzer@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
diff --git a/arm_compute/core/NEON/kernels/NESobel5x5Kernel.h b/arm_compute/core/NEON/kernels/NESobel5x5Kernel.h
index 5dfce8d..9770c2c 100644
--- a/arm_compute/core/NEON/kernels/NESobel5x5Kernel.h
+++ b/arm_compute/core/NEON/kernels/NESobel5x5Kernel.h
@@ -114,5 +114,5 @@
     bool     _run_sobel_x; /**< Do we need to run sobel X? */
     bool     _run_sobel_y; /**< Do we need to run sobel Y? */
 };
-}
+} // namespace arm_compute
 #endif /*__ARM_COMPUTE_NESOBEL5x5KERNEL_H__ */