fix(deb): use printf insteand of echo

Author: Deuchnord

Makefile

@@ -107,7 +107,7 @@ kosmorro.deb:
 	# remove pycache folders:
 	rm -rf tmp/kosmorro/__pycache__ tmp/kosmorro/i18n/__pycache__
 	# Replace shebang in executable:
-	echo -e "#!/usr/bin/env python3\n$$(tail -n +2 tmp/bin/kosmorro)" > tmp/bin/kosmorro
+	printf "#!/usr/bin/env python3\n$$(tail -n +2 tmp/bin/kosmorro)" > tmp/bin/kosmorro
 
 	cp -r tmp/kosmorro kosmorro-deb/usr/lib/python3/dist-packages
 	cp -r tmp/kosmorro-$(KOSMORRO_VERSION).dist-info kosmorro-deb/usr/lib/python3/dist-packages