board/intel/galileo: fix build failure with host gcc 10

Building galileo_defconfig throws error:
```
/usr/bin/ld: arch/x86/tools/relocs_64.o:(.bss+0x0): multiple definition of `per_cpu_load_addr'; arch/x86/tools/relocs_32.o:(.bss+0x0): first defined here
```

To fix this let's add an upstreamed patch[1] and add BR2_GLOBAL_PATCH_DIR
to galileo_defconfig to point to where patch is.

[1]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=eeeda4cd06e828b331b15741a204ff9f5874d28d.patch

Fixes:
https://gitlab.com/ymorin/buildroot/-/jobs/2035821039



Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>