defconfig: sdxnightjar: disable panic on oom on sdxnightjar

sdx targets rely on oom killer to kill the processes as there is
no lmk. so, disable panic_on_oom on sdxnightjar.

Change-Id: I67f055ec9e7412495360cdc5f1aa2350a4e3fab9
Signed-off-by: Vijayanand Jitta <vjitta@codeaurora.org>