Fixes chmod invocation

Author: svavassori

script/package.sh

@@ -55,7 +55,7 @@ if [ -L /usr/share/rtl_airband/config/default.conf ]; then
 fi
 EOF
 
-chmod 755 "${package_root}/DEBIAN/{postinst,prerm}"
+chmod 755 "${package_root}/DEBIAN/postinst" "${package_root}/DEBIAN/prerm"
 
 
 # creates package structure