x86, efi stub: Add .reloc section back into image

x86, efi stub: Add .reloc section back into image

Some UEFI firmware will not load a .efi with a .reloc section
with a size of 0.

Therefore, we create a .efi image with 4 main areas and 3 sections.
1. PE/COFF file header
2. .setup section (covers all setup code following the first sector)
3. .reloc section (contains 1 dummy reloc entry, created in build.c)
4. .text section (covers the remaining kernel image)

To make room for the new .setup section data, the header
bugger_off_msg had to be shortened.

Reported-by: Henrik Rydberg <[email protected]>
Signed-off-by: Jordan Justen <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Tested-by: Lee G Rosenbaum <[email protected]>
Tested-by: Henrik Rydberg <[email protected]>
Cc: Matt Fleming <[email protected]>
Signed-off-by: H. Peter Anvin <[email protected]>