Modem monitor daemon will access /dev/rmt_sys_evt
device node to know if remote system has crashed or
not. This commit adds selinux rules for modem
monitor to allow access to this device node.

Change-Id: I2c0ce5cda3b6a1ed35f442d5b10be4e49d4b7879
Signed-off-by: Rishi Gupta <rishgupt@codeaurora.org>