mv _testcgo => _testrt

cl/_testrt/allocstr/in.go

@@ -0,0 +1,13 @@
+package main
+
+import (
+	"github.com/goplus/llgo/internal/runtime/c"
+)
+
+func hello() string {
+	return "Hello world\n"
+}
+
+func main() {
+	c.Printf(c.AllocaCStr(hello()))
+}