ipmiutil: new package

[Thomas:
  - remove dependency on SSP support by adding a patch that changes
    the configure.ac script stack protector test to actually work.
  - rewrap Config.in help text
  - fix how BR2_USE_MMU is used when displaying the comment.
  - fix the license, it's BSD-3c, not BSD-2c.
  - bump to version 2.9.5.]

Signed-off-by: David Bachelart <david.bachelart@bbright.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>