fstab: mount securityfs

The sescurityfs is a kernel virtual filesystem that provides access to
security devices like TPMs. Mount it to the sysfs so that it can be used
to read TPM events.

Signed-off-by: Alex Stewart <alex.stewart@emerson.com>

Author: Alex Stewart

recipes-core/base-files/base-files/x64/fstab

@@ -1,10 +1,11 @@
 # stock fstab - you probably want to override this with a machine specific one
 
-/dev/root            /                    auto       defaults              1  1
-proc                 /proc                proc       defaults              0  0
-devpts               /dev/pts             devpts     mode=0620,gid=5       0  0
-tmpfs                /run                 tmpfs      mode=0755,nodev,nosuid,strictatime 0  0
-tmpfs                /var/volatile        tmpfs      size=26%              0  0
+/dev/root            /                    auto        defaults              1  1
+proc                 /proc                proc        defaults              0  0
+devpts               /dev/pts             devpts      mode=0620,gid=5       0  0
+tmpfs                /run                 tmpfs       mode=0755,nodev,nosuid,strictatime 0  0
+tmpfs                /var/volatile        tmpfs       size=26%              0  0
+securityfs           /sys/kernel/security securityfs  defaults              0  0
 
 # uncomment this if your device has a SD/MMC/Transflash slot
 #/dev/mmcblk0p1       /media/card          auto       defaults,sync,noauto  0  0