To avoid collision with dev-libs/libedit
we rename man/editline.3 to man/libeditline.3

This patch also needs a rename from outside the patch:
    $ mv man/editline.3 man/libeditline.3

--- a/man/Makefile.am
+++ b/man/Makefile.am
@@ -3,1 +3,1 @@
-dist_man_MANS = editline.3
+dist_man_MANS = libeditline.3