packages-cleaner: remove trailing whitespace during automated pass

Signed-off-by: Ian Leonard <antonlacon@gmail.com>

tools/packages-checker

@@ -10,6 +10,7 @@
 for directory in $(find packages/ -mindepth 1 -maxdepth 1 -type d | sort); do
   for file in $(find "${directory}" -type f -name "package.mk" | sort); do
     tools/fixlecode.py -qw -f "${file}"
+    sed -i 's/[[:blank:]]*$//g' "${file}"
   done
   git commit -qs -m "${directory##*/}: automated code cleanup" "${directory}"
 done