Fix intersection with linux system call personality()

Fix intersection with linux system call personality()

On ASan sanitized firmware testing we got segmentation fault
error in ps application.
Its source is in system call personality() and global variable
"personality" names intersection: It leaded to system call
pointer change and error after Its call.

This patch fixes the error by changeng intersected global
variable name to "_personality"

Change-Id: I8b3faee8db91457a1d1cc1c5e0fa9cc64e3e6d6f
Signed-off-by: Dmitriy Evgenevich Gonzha <d.gonzha@samsung.com>