redhat/kernel.spec: work around find-debuginfo aborting cross builds

Jan Stancekrequested to merge
jstancek/kernel-ark:skip_gdb_add_index_for_cross_builds into os-build

debugedit > 5.0-16 now aborts cross builds. It was already attempting to use host binaries on cross compiled ones, but with recent update it also strictly checks for errors and aborts:

objcopy: Unable to recognise the format of the input file `.../internal/drivers/gpu/drm/tests/drm_exec_test.ko' *** ERROR:: GDB exited with exit status 1 during index generation

This starts with commit: https://sourceware.org/git/?p=debugedit.git;a=commit;h=dfe1f7ff30f4e0be538835fca1e6348723ea7aa7

There's RFE opened to support overriding of host tools with one for cross-compiling, RHEL-21797. But for now, undefine _include_gdb_index to skip this code to allow cross builds to continue.

Signed-off-by: Jan Stancek jstancek@redhat.com

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