scripts/pahole-flags.sh: Enable parallelization of pahole.

Pass a -j argument to pahole to parse DWARF and generate BTF with
multithreading.

Signed-off-by: Kui-Feng Lee <[email protected]>

Author: Kui-Feng Lee

scripts/pahole-flags.sh

@@ -1,7 +1,7 @@
 #!/bin/sh
 # SPDX-License-Identifier: GPL-2.0
 
-extra_paholeopt=
+extra_paholeopt=-j
 
 if ! [ -x "$(command -v ${PAHOLE})" ]; then
 	exit 0