m4: Give camera blobs access to memory info

Sense 6 blobs want to read /proc/vmallocinfo and debugfs:ion/mm, but
they expect debugfs mounted at /data/d.

Change-Id: Ie3e44719a926496963810cd4154172d97838c41b
m4: Fix deprecated fstab syntax

Change-Id: I4c6bf2237245ce24378a5ca8748796810a4c9115