msm8953-common: rootdir: Do not symlink sdcard legacy path

Solves the following denial.
denied  { write } for  pid=548 comm="init" name="storage" dev="rootfs" ino=15996 scontext=u:r:vendor_init:s0 tcontext=u:object_r:rootfs:s0 tclass=dir permissive=0

Change-Id: If246f497bd8384f0fee81469d8d29dcb528d4d4e