msm: adsprpc: Handle UAF in ramdumps collection

Added process exit checks when adding
file init memory to ramdump collection
to fix use after free for file init memory.

Change-Id: I8991d27e4c83f572a6baacc478a09eb42ea76d8f
Acked-by: Krishnaiah Tadakamalla <ktadakam@qti.qualcomm.com>
Signed-off-by: Jeya R <jeyr@codeaurora.org>