kbuild, modpost: fix "non-allocatable section" warnings

[Sam Ravnborg]

It turned out there were at least three sources of
the "non-allocatable section" warning.

1) SUSE specific .comment section
2) endianness issues in elf header
3) additional debug sections

I have updated kbuild-fixes.git with
patches for all of the above.

But as we have seen three independent sources of this
warning within short time I expect there may be
yet-to-be-discovered issues.

The patches accumulated so far all looks trivially correct
and Jean and Sean has been quick to test them.
So unless something unexpected shows up I plan to push them
within a day or two.

I would like to see them in -next for a day or two first
in the hope that if other architectures has troubles
they will report this before it hits upstream.

Patches will follow for reference / testing.

	Sam