Make non-verbose build output more consistent
Don't link RT libs against kernel thread ulapi.so modules

xenomai-kernel:

    dpkg-shlibdeps: warning: package could avoid a useless dependency if
    [...]/usr/lib/linuxcnc/ulapi-xenomai-kernel.so
    was not linked against libxenomai.so.0 (it uses none of the library's
    symbols)

    dpkg-shlibdeps: warning: package could avoid a useless dependency if
    [...]/usr/lib/linuxcnc/ulapi-xenomai-kernel.so
    was not linked against libnative.so.3 (it uses none of the library's
    symbols)

    dpkg-shlibdeps: warning: package could avoid a useless dependency if
    [...]/usr/lib/linuxcnc/ulapi-xenomai-kernel.so
    was not linked against librt.so.1 (it uses none of the library's
    symbols)

rtai-kernel:

    dpkg-shlibdeps: warning: package could avoid a useless dependency if
    [...]/usr/lib/linuxcnc/ulapi-rtai-kernel.so
    was not linked against liblxrt.so.1 (it uses none of the library's
    symbols)