scripts/get_abi.pl: ignore some temp files

When there are filenames of the form ".orig" or ".rej" in
the Documenatation/ABI/ subdirectories, there can be confusing or
erroneous output generated. Example: the file
Documenation/ABI/testing/sysfs-bus-papr-pmem.orig causes this
warning message:

Documentation/ABI/testing/sysfs-bus-papr-pmem:2: WARNING: unknown document: '/powerpc/papr_hcalls'

Prevent this by skipping over filenames that may be created by
patch/diff tools etc.

Signed-off-by: Randy Dunlap <[e-mail]>
Cc: Greg Kroah-Hartman <[e-mail]>
Cc: Jonathan Corbet <[e-mail]>
Cc: [e-mail]
Acked-by: Mauro Carvalho Chehab <[e-mail]>
Signed-off-by: Jonathan Corbet <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

scripts/get_abi.pl

···
 	return if ($mode & S_IFDIR);
 	return if ($file =~ m,/README,);
 	return if ($file =~ m,/\.,);
+	return if ($file =~ m,\.(rej|org|orig|bak)$,);
 
 	my $name = $file;
 	$name =~ s,.*/,,;