GAPI GPU: fix for tests failure.

modules/gapi/perf/gpu/gapi_core_perf_tests_gpu.cpp

@@ -54,14 +54,14 @@ INSTANTIATE_TEST_CASE_P(MulPerfTestGPU, MulPerfTest,
                                 Values(cv::compile_args(CORE_GPU))));
 
 INSTANTIATE_TEST_CASE_P(MulDoublePerfTestGPU, MulDoublePerfTest,
-                        Combine(Values(AbsExact().to_compare_f()),
+                        Combine(Values(Tolerance_FloatRel_IntAbs(1e-5, 1).to_compare_f()),
                                 Values( szSmall128, szVGA, sz720p, sz1080p ),
                                 Values( CV_8UC1, CV_8UC3, CV_16UC1, CV_16SC1, CV_32FC1 ),
                                 Values( -1, CV_8U, CV_16U, CV_32F ),
                                 Values(cv::compile_args(CORE_GPU))));
 
 INSTANTIATE_TEST_CASE_P(MulCPerfTestGPU, MulCPerfTest,
-                        Combine(Values(AbsExact().to_compare_f()),
+                        Combine(Values(Tolerance_FloatRel_IntAbs(1e-5, 1).to_compare_f()),
                                 Values( szSmall128, szVGA, sz720p, sz1080p ),
                                 Values( CV_8UC1, CV_8UC3, CV_16UC1, CV_16SC1, CV_32FC1 ),
                                 Values( -1, CV_8U, CV_16U, CV_32F ),