[clang][Interp][NFC] Make a single-line comment a doc comment

Author: tbaederr

clang/lib/AST/Interp/Pointer.h

@@ -246,7 +246,7 @@ class Pointer {
 
   /// Returns the record descriptor of a class.
   Record *getRecord() const { return getFieldDesc()->ElemRecord; }
-  // Returns the element record type, if this is a non-primive array.
+  /// Returns the element record type, if this is a non-primive array.
   Record *getElemRecord() const { return getFieldDesc()->ElemDesc->ElemRecord; }
   /// Returns the field information.
   const FieldDecl *getField() const { return getFieldDesc()->asFieldDecl(); }