doc/README.PATCH-POLICY.SUSE: Update information about the tools
    (jsc#PED-5021)
    
    * Replace bugzilla.novell.com with bugzilla.suse.com and FATE with Jira.
    * Limit the range of commits in the exportpatch example to prevent it
      from running for too long.
    * Incorporate URLs directly into the text.
    * Fix typos and improve some wording, in particular avoid use of "there
      is/are" and prefer the present tense over the future one.