gentoo-overlay/app-doc/devmanual/files/devmanual-eclasses.patch

The offline version doesn't generate eclass manpages.
Add a dummy file, otherwise internal links would be broken.

--- /dev/null
+++ b/eclass-reference/text.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0"?>
+<guide self="eclass-reference/">
+<chapter>
+<title>Eclass Reference</title>
+<body>
+
+<note>
+The offline version of the devmanual does not include the documentation for the
+eclasses. If you need it, emerge <c>app-doc/eclass-manpages</c>.
+</note>
+
+</body>
+</chapter>
+</guide>