Allow tests to run on loong64

Signed-off-by: Tianle Xu <xtl@xtlsoft.top>

pkg/plugin/plugin_test.go

@@ -92,6 +92,7 @@ func TestPlatformPrepareCommand(t *testing.T) {
 				{OperatingSystem: "linux", Architecture: "ppc64le", Command: "echo -n linux-ppc64le"},
 				{OperatingSystem: "linux", Architecture: "s390x", Command: "echo -n linux-s390x"},
 				{OperatingSystem: "linux", Architecture: "riscv64", Command: "echo -n linux-riscv64"},
+				{OperatingSystem: "linux", Architecture: "loong64", Command: "echo -n linux-loong64"},
 				{OperatingSystem: "windows", Architecture: "amd64", Command: "echo -n win-64"},
 			},
 		},
@@ -111,6 +112,8 @@ func TestPlatformPrepareCommand(t *testing.T) {
 		osStrCmp = "linux-s390x"
 	} else if os == "linux" && arch == "riscv64" {
 		osStrCmp = "linux-riscv64"
+	} else if os == "linux" && arch == "loong64" {
+		osStrCmp = "linux-loong64"
 	} else if os == "windows" && arch == "amd64" {
 		osStrCmp = "win-64"
 	} else {