system/nut: Install bash-completion file to systemwide dir

system/nut/nut.SlackBuild

@@ -130,8 +130,8 @@ find $PKG/usr/man -type f -exec gzip -9 {} \;
 for i in $( find $PKG/usr/man -type l ) ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done
 
 # Install the bash_completion script
-install -d $PKG/etc/bash_completion.d
-install -m 755 scripts/misc/nut.bash_completion $PKG/etc/bash_completion.d/nut
+install -d $PKG/usr/share/bash-completion/completions
+install -m 755 scripts/misc/nut.bash_completion $PKG/usr/share/bash-completion/completions/nut
 
 # Install the startup script
 install -d $PKG/etc/rc.d