build failed for pd-xsample

[Manuel Virgilio <manuel.virgilio@powerprogress.org>]

    Hello Benjamin,
    
    about ppc64 build fail
    https://buildd.debian.org/status/package.php?p=pd-xsample
    
    I find out that this patch to debian/rules should works for
    ppc64.
    It enables -maltivec for ppc64 and clean deken_cpu as you did for
    ppc64le
    
    I hope this could help.
    
    Regards,
    Manuel
    
  

12a13,16
> else ifeq ($(DEB_HOST_ARCH),ppc64)
> # Skip Pd64 externals also for ppc64, because vec_dst does not support double
> deken_cpu =
> export DEB_CFLAGS_MAINT_APPEND += -maltivec