Add entry for readline documentation.
diff --git a/Doc/Makefile.deps b/Doc/Makefile.deps
index 9a547bb..4b7c12e 100644
--- a/Doc/Makefile.deps
+++ b/Doc/Makefile.deps
@@ -226,6 +226,7 @@
 	../lib/libnis.tex \
 	../lib/libpipes.tex \
 	../lib/libpty.tex \
+	../lib/libreadline.tex \
 	../lib/librlcompleter.tex \
 	../lib/libsched.tex \
 	../lib/libstatvfs.tex \