kbuild: rpm-pkg: Add (elfutils-devel or libdw-devel) to BuildRequires

The dwarf.h header, which is included by
scripts/gendwarfksyms/gendwarfksyms.h, resides within elfutils-devel
or libdw-devel package.

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

Consequently, add (elfutils-devel or libdw-devel) to BuildRequires to
prevent unforeseen compilation failures.

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

Link: https://lore.kernel.org/all/[email protected]/
Fixes: f285688 ("tools: Add gendwarfksyms")
Suggested-by: Petr Pavlu <[email protected]>
Signed-off-by: WangYuli <[email protected]>
Reviewed-by: Nicolas Schier <[email protected]>
Signed-off-by: Masahiro Yamada <[email protected]>

Author: Avenger-285714

scripts/package/kernel.spec

@@ -16,6 +16,7 @@ Source1: config
 Source2: diff.patch
 Provides: kernel-%{KERNELRELEASE}
 BuildRequires: bc binutils bison dwarves
+BuildRequires: (elfutils-devel or libdw-devel)
 BuildRequires: (elfutils-libelf-devel or libelf-devel) flex
 BuildRequires: gcc make openssl openssl-devel perl python3 rsync