libdir=$(get_libdir) dodir /usr/${libdir} insinto /usr/${libdir} doins ./usr/${libdir}/*.so last line should be hardcoded to ./usr/lib/*.so, as it is right now it tries to copy files from /usr/lib32 which does not exist.
*** Bug 113717 has been marked as a duplicate of this bug. ***
problem is corrected in -r2 thanks Wolfram Sclich.