gc: fix reflect table method receiver

Fixes #451.
Fixes #770.

R=ken2
CC=golang-dev
https://golang.org/cl/2207045
diff --git a/doc/go_spec.html b/doc/go_spec.html
index 8735d4e..ea7a75c 100644
--- a/doc/go_spec.html
+++ b/doc/go_spec.html
@@ -5168,6 +5168,6 @@
 <h2 id="Implementation_differences"><span class="alert">Implementation differences - TODO</span></h2>
 <ul>
 	<li><span class="alert">Implementation does not honor the restriction on goto statements and targets (no intervening declarations).</span></li>
-	<li><span class="alert">Method expressions are partially implemented.</span></li>
+	<li><span class="alert">Gccgo: Method expressions are partially implemented.</span></li>
 	<li><span class="alert">Gccgo: allows only one init() function per source file.</span></li>
 </ul>