mxraid_assemble: Don't bail out if a single assembly fails

The 'die' was from the development phase, now it's deemed ok to
continue building the other RAIDS (if any). This closes #34.

mxraid/mxraid_assemble

@@ -241,7 +241,7 @@ sub create_mdadm_configs {
           my @args = ('mdadm', '-A', '/dev/md'.$dev_no, '-c', $conf_fn);
           push @args, split m/\s+/, $MDADM_ASSEMBLE_OPTIONS if $MDADM_ASSEMBLE_OPTIONS;
           warn printf "#  NOTE: $rlabel, running '%s'\n", join(' ', @args) if $VERBOSE >= 2;
-          system (@args) == 0 or die "# Error system @args failed: $?";
+          system (@args) == 0 or warn "# Error system @args failed: $?" if $VERBOSE >= 1;
         } else {
           printf "mdadm -A /dev/md%d -c %s\n", $dev_no, $conf_fn;
         }