kbuild: pacman-pkg: package unstripped vDSO libraries

kbuild: pacman-pkg: package unstripped vDSO libraries

The unstripped vDSO files are useful for debugging.
They are provided in the upstream 'linux-headers' package.

Also package them as part of 'make pacman-pkg'.
Make them part of the '-debug' package, as they fit there best.
This differs from the upstream package as that has no '-debug' variant.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Link: https://patch.msgid.link/20260318-kbuild-pacman-vdso-install-v1-1-48ceb31c0e80@weissschuh.net
Signed-off-by: Nathan Chancellor <nathan@kernel.org>