The 'debian' target doesn't exist and there is no rule to make it, so
remove it from EXTRA_DIST.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
## with automake 1.8, putting the m4 directory in EXTRA_DIST is not needed, and
## causes 'make distcheck' to fail, by way of 'make distdir' failing when builddir != srcdir
## and srcdir is read-only.
-EXTRA_DIST = debian comedilib.spec autogen.sh perl
+EXTRA_DIST = comedilib.spec autogen.sh perl
ACLOCAL_AMFLAGS = -I m4