llgen bugfix

cl/_testcgo/any/in.go

@@ -1,16 +1,13 @@
 package main
 
-import _ "unsafe"
+import (
+	"github.com/goplus/llgo/internal/runtime/c"
+)
 
 func incVal(a any) int {
 	return a.(int) + 1
 }
 
-//go:linkname printf C.printf
-func printf(format *int8, __llgo_va_list ...any)
-
-var format = [...]int8{'H', 'e', 'l', 'l', 'o', ' ', '%', 'd', '\n', 0}
-
 func main() {
-	printf(&format[0], incVal(100))
+	c.Printf(c.String("Hello %d\n"), incVal(100))
 }