* Cross-build fixes based of patch by Colin Watson; LP: #873584. - Build deb and udeb flavors with --with-pci-ids-path=/usr/share/misc/pci.ids as this is required when cross-compiling but can safely be passed all the time. - Disable gtk-doc build when cross-compiling and exclude doc files when calling dh_install; building gtk-doc requires running a generated source (lt-gudev-scan) which is usually not possible when cross-compiling; should really be fixed to build this scanner with BUILD_CC instead, but this would require building whole projects twice too. - Also disable GObject introspection and exclude these files for the same reason as for gtk-doc (needs to run a scanner program which can't be run when cross-compiling).