Update rustc-guide

JohnTitor · JohnTitor · commit 3adad330127b · 2019-07-04T20:56:13.000+09:00
diff --git a/src/doc/rustc-guide b/src/doc/rustc-guide
@@ -1 +1 @@
-Subproject commit abf512fc9cc969dcbea69aa15b44586bbeb13c2d
+Subproject commit b5a2b9353c661000378415ecfeb757eb7df42d66
