[grub2/f21] (6 commits) ...Handle os-prober and tftp path generation better.

[Peter Jones]

Summary of changes:

  7e21de4... Ignore all files name *.rpm (*)
  9ccddf4... Make grubenv work correctly on UEFI machines. (*)
  ee7733c... Don't process a ton of grub modules with find-debuginfo.sh (*)
  ab37733... Don't specify -Wp,-D_FORTIFY_SOURCE; it makes no sense with (*)
  58fe9aa... Various updates that came from rhel 7.1 work. (*)
  9d85b1d... Handle os-prober and tftp path generation better. (*)

(*) This commit already existed in another branch; no separate mail sent