[build-script] Skip unsupported 'check-swift-only_long-optimize' test variant

Author: rintaro

utils/build-script-impl

@@ -1227,7 +1227,7 @@ function calculate_targets_for_host() {
                 fi
             fi
             SWIFT_TEST_TARGETS+=("check-swift${test_subset_target_suffix}${test_target_suffix}-${stdlib_deployment_target}")
-            if [[ $(not ${SKIP_TEST_OPTIMIZED}) && ! -n "${test_host_only}" ]] ; then
+            if [[ $(not ${SKIP_TEST_OPTIMIZED}) && ! -n "${test_host_only}" && "${test_subset_target_suffix}" != "-only_long" ]] ; then
                 SWIFT_TEST_TARGETS+=("check-swift${test_subset_target_suffix}-optimize-${stdlib_deployment_target}")
             fi
         fi