compiler: fix a typo in comments

Change-Id: I1d895ba7e553c63a5fadae2208f062a151c8e8b7
Reviewed-on: https://go-review.googlesource.com/c/163097
Reviewed-by: Ian Lance Taylor <iant@golang.org>
diff --git a/go/types.h b/go/types.h
index 4bc5497..e3343cf 100644
--- a/go/types.h
+++ b/go/types.h
@@ -3086,7 +3086,7 @@
     return this->all_methods_ == NULL;
   }
 
-  // Return the list of locally defined methos.  This will return NULL
+  // Return the list of locally defined methods.  This will return NULL
   // for an empty interface.  Embedded interfaces will appear in this
   // list as an entry with no name.
   const Typed_identifier_list*