fixup clippy lint

Author: addisoncrump

libafl_libfuzzer/libafl_libfuzzer_runtime/build.rs

@@ -1,5 +1,6 @@
 use std::{env, path::Path};
 
+#[allow(clippy::too_many_lines)]
 fn main() {
     let out_dir = env::var_os("OUT_DIR").unwrap();