msm: kgsl: add global buffers to snapshot

Add the memstore, setstate_memory, and pwron_fixup to the snapshot
static section. There are a couple other global buffers (profiler stuff),
that are too big and not useful enough to dump.

Change-Id: I2f81475a6229eeada79db4ee644db81cdeea1924
Signed-off-by: Jeremy Gebben <jgebben@codeaurora.org>