Various bug fixes
    
    - Fix grub.cfg boot counting snippet generation (lorbus)
      Resolves: rhbz#1614637
    - Fix spurrious allocation error reporting on EFI boot
      Resolves: rhbz#1635319
    - Stop doing TPM on BIOS *again*.  It just doesn't work.
      Related: rhbz#1579835
    - Make blscfg module loadable on older grub2 i386-pc and powerpc-ieee1275
      builds
    - Fix execstack cropping up in grub2-tools
    - Ban stack trampolines with compiler flags.
    
    Signed-off-by: Peter Jones <pjones@redhat.com>