Allow init to write to /proc/cpu/alignment

The root init.rc does "write /proc/cpu/alignment 4", but we don't
actually allow this write in core sepolicy. This seems to be a 32-bit
ARM only proc file.

Noticed when booting 32-bit ARM Cuttlefish.

Bug: 145371497
Change-Id: Ic099395708f7236bcc2fc5c561809a7e129786de
4 files changed