msm: adsprpc: overflow vulnerability by race condition in adsprpc driver

Create local copy of current->comm to avoid the possibility of modification
in race condition.

Change-Id: Ie10f6577ed7edb9279a36039348e7a1ad25239f9
Acked-by: Nishant Chaubey <chaubey@qti.qualcomm.com>
Signed-off-by: Jeya R <jeyr@codeaurora.org>