test(agc): word the lavapipe skips of two tests as device limitations

core/libs/prx/libSceAgcDriver/tests/Recorder.cpp

@@ -6734,7 +6734,7 @@ int main(int argc, char** argv) {
         }
         if (argc == 2 && std::string_view(argv[1]) == "--shadowed-key-stores-only") {
             if (!shadowedKeyStoreTests(device, recorder)) {
-                std::cout << "skipped, unit shadows over a watched host import are unavailable\n";
+                std::cout << "skipped, the device imports no watched host memory under a unit shadow\n";
                 return 77;
             }
             std::cout << "DCC keys under unit shadows tests passed\n";

core/libs/prx/libSceAgcDriver/tests/execution/AlphaToCoverage.cpp

@@ -458,7 +458,7 @@ int main(int argc, char** argv) {
                 DitheredCoverage(*device);
             } catch (const std::runtime_error& error) {
                 if (std::string_view(error.what()) != "AGC graphics: the device cannot render color with the target's sample count") throw;
-                std::printf("skipped, eight-sample color attachments are unavailable: %s\n", error.what());
+                std::printf("skipped, the device lacks eight-sample color attachments: %s\n", error.what());
                 return VulkanTestSkipped;
             }
             std::puts("dithered eight-sample alpha-to-coverage tests passed");