move out c/cpp/py

cl/_testdata/importpkg/stdio/printf.go

@@ -0,0 +1,17 @@
+package stdio
+
+import _ "unsafe"
+
+const (
+	LLGoPackage = true
+)
+
+//go:linkname Printf C.printf
+func Printf(format *int8, __llgo_va_list ...any)
+
+func Max(a, b int) int {
+	if a > b {
+		return a
+	}
+	return b
+}