* Resynchronize on Debian, remaining diff * Convert to multiarch (LP: #902703): - Pass --libdir with multiarch path to configure - Adjust .install files to refer to /usr/lib subdirs - Add multiarch Pre-Depends - Bump debhelper and cdbs build-deps for ${misc:Pre-Depends} and $(DEB_HOST_MULTIARCH) support, respectively * debian/compat: update to 9.