Increase deadline for 1byte fixture

test/core/end2end/fixtures/h2_sockpair_1byte.c

@@ -144,6 +144,8 @@ static grpc_end2end_test_config configs[] = {
 int main(int argc, char **argv) {
   size_t i;
 
+  g_fixture_slowdown_factor = 2.0;
+
   grpc_test_init(argc, argv);
   grpc_end2end_tests_pre_init();
   grpc_init();