Install_deps.sh: ask suse users whether they want to install packman or not (can be already installed/enabled from a different URL, Suse repositories management is to complex to be handled automatically at this point).

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@57619 954f8c5b-7b00-dc11-b283-0030488c597c