kbuild: deb-pkg: Add libdw-dev:native to Build-Depends-Arch

The dwarf.h header, which is included by
scripts/gendwarfksyms/gendwarfksyms.h, resides within the libdw-dev
package.

This portion of the code is compiled under the condition that
CONFIG_GENDWARFKSYMS is enabled.

Consequently, add libdw-dev to Build-Depends-Arch to prevent
unforeseen compilation failures.

Fix follow possible error:
In file included from scripts/gendwarfksyms/symbols.c:6:
scripts/gendwarfksyms/gendwarfksyms.h:6:10: fatal error: 'dwarf.h' file not found
6 | #include <dwarf.h>
| ^~~~~~~~~

Fixes: f28568841ae0 ("tools: Add gendwarfksyms")
Reviewed-by: Sami Tolvanen <[e-mail]>
Signed-off-by: WangYuli <[e-mail]>
Reviewed-by: Nicolas Schier <[e-mail]>
Tested-by: Nicolas Schier <[e-mail]>
Signed-off-by: Masahiro Yamada <[e-mail]>

scripts/package/mkdebian

···
 Build-Depends: debhelper-compat (= 12)
 Build-Depends-Arch: bc, bison, flex,
  gcc-${host_gnu} <!pkg.${sourcename}.nokernelheaders>,
- kmod, libelf-dev:native,
+ kmod, libdw-dev:native, libelf-dev:native,
  libssl-dev:native, libssl-dev <!pkg.${sourcename}.nokernelheaders>,
  python3:native, rsync
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