Avoid installing META files for labltk and camlp4: Those are provided by their
Index: findlib-1.8.0/configure
===================================================================
--- configure.orig 2018-04-17 12:53:14.000000000 -0400
+++ configure 2018-04-17 12:53:45.000000000 -0400
# Generate the META files now.
-l="$ldbm dynlink $lgraphics $lnum str threads unix stdlib bigarray ocamldoc $llabltk $lcamlp4 $lobuild $lcomplibs $lbytes $lspacetime"
+l="$ldbm dynlink $lgraphics $lnum str threads unix stdlib bigarray ocamldoc $lobuild $lcomplibs $lbytes $lspacetime"
for dir in site-lib-src/*; do
# We do not really know if $dir is a directory.