Implementation of RSQRT for quantized int8

Resolves: COMPMID-5863
Change-Id: I9ff67face62826c1d335a6b941e8516be39bdac8
Signed-off-by: Ramy Elgammal <ramy.elgammal@arm.com>
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/c/VisualCompute/ComputeLibrary/+/488768
Tested-by: bsgcomp <bsgcomp@arm.com>
Comments-Addressed: bsgcomp <bsgcomp@arm.com>
Reviewed-by: Gunes Bayir <gunes.bayir@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/9225
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Benchmark: Arm Jenkins <bsgcomp@arm.com>
diff --git a/SConscript b/SConscript
index 205764b..03b94b6 100644
--- a/SConscript
+++ b/SConscript
@@ -369,6 +369,7 @@
                        'src/core/CL/cl_kernels/common/elementwise_operation.cl',
                        'src/core/CL/cl_kernels/common/elementwise_operation_quantized.cl',
                        'src/core/CL/cl_kernels/common/elementwise_unary.cl',
+                       'src/core/CL/cl_kernels/common/elementwise_unary_quantized.cl',
                        'src/core/CL/cl_kernels/common/experimental/gemm_fused_post_ops/act_eltwise_op_act/gemm_mm_native.cl',
                        'src/core/CL/cl_kernels/common/experimental/gemm_fused_post_ops/act_eltwise_op_act/gemm_mm_reshaped.cl',
                        'src/core/CL/cl_kernels/common/experimental/gemm_fused_post_ops/act_eltwise_op_act/gemm_mm_reshaped_only_rhs.cl',