tools: Print selinux context of files in hosts.

Log collector gives you the information whether the selinux is enables
or not, but do not display the selinux context of files and folders.

This patch adds a new output file of the context of the selinux in
specific folders such as (/rhev /etc /var)

Change-Id: I53eddd683edc38502e881081b4bd35e15dae3a69
Signed-off-by: Maor Lipchuk <mlipchuk@redhat.com>