aya: BpfError: set the #[source] attribute for RelocationErrors

aya/src/bpf.rs

@@ -371,6 +371,7 @@ pub enum BpfError {
     #[error("error relocating `{function}`")]
     RelocationError {
         function: String,
+        #[source]
         error: Box<dyn Error + Send + Sync>,
     },