Add documentation link

Author: Kai Luo

src/symbolize/gimli/xcoff.rs

@@ -159,8 +159,10 @@ impl<'a> Object<'a> {
         if (sym.address..sym.address + sym.size).contains(&addr) {
             // On AIX, for a function call, for example, `foo()`, we have
             // two symbols `foo` and `.foo`. `foo` references the function
-            // descriptor and `.foo` references the function entry. We trim
-            // the prefix `.` here, so that the rust demangler can work
+            // descriptor and `.foo` references the function entry.
+            // See https://www.ibm.com/docs/en/xl-fortran-aix/16.1.0?topic=calls-linkage-convention-function
+            // for more information.
+            // We trim the prefix `.` here, so that the rust demangler can work
             // properly.
             Some(sym.name.trim_start_matches(".").as_bytes())
         } else {