Package: lintian as seen in https://lintian.debian.org/maintainer/debian-gcc@lists.debian.org.html#gcc-5lintian complains about new dev-pkg-without-shlib-symlink issues, because it doesn't search for these files in the correct gcc lib dir, which now has a different path on i386* archs. Please adjust the check to include i686 subdirs like i585 subdirs.