runtime: add __artiq_personality stub

runtime/src/kernel.rs

@@ -84,12 +84,15 @@ fn resolve(required: &[u8]) -> Option<u32> {
         api!(rtio_input_timestamp = rtio::input_timestamp),
         api!(rtio_input_data = rtio::input_data),
         api!(rtio_input_timestamped_data = rtio::input_timestamped_data),
+        api!(__artiq_personality = __artiq_personality),
     ];
     api.iter()
        .find(|&&(exported, _)| exported.as_bytes() == required)
        .map(|&(_, ptr)| ptr as u32)
 }
 
+fn __artiq_personality() {
+}
 
 #[no_mangle]
 pub fn main_core1() {