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

system/pytrash/pytrash.SlackBuild

@@ -84,7 +84,11 @@ mkdir -p $PKG/usr/bin
 install --mode=755 src/$PRGNAM $PKG/usr/bin
 
 cp -R etc $PKG
-chmod 755 $PKG/etc/bash_completion.d/$PRGNAM-bash-complition.sh
+
+mkdir -p $PKG/usr/share/bash-completion/completions
+mv $PKG/etc/bash_completion.d/$PRGNAM-bash-complition.sh \
+   $PKG/usr/share/bash-completion/completions/$PRGNAM
+rm -rf $PKG/etc/bash_completion.d
 
 # python libs
 PY3VER="$(python3 -c 'import sys; ver = sys.version_info; \