ARM: defconfig: Enable config for msm8937_32 and msm8937_32go

Enable config CONFIG_SLAB_FREELIST_RANDOM and
CONFIG_SLAB_FREELIST_HARDENED to support
an additional layer of security against heap memory.

Change-Id: I8dba5eef3442c941e1a60f9f4516de634ead3a90
Signed-off-by: Prakash Yadachi <quic_pyadachi@quicinc.com>