init.rc: Create /storage mountpoint so Dalvik can mark as slave in zygotes

Mount a tmpfs as /storage in order to create a mountpoint, so that Dalvik
can later mark /storage as slave in zygotes.  Must use tmpfs as rootfs
can't be bind mounted (otherwise "mount rootfs /storage /storage bind"
would work as an alternative).
unpackbootimg: remove host LOCAL_MODULE_TAG

Change-Id: I199d680dc5ab8bf50f5be65c29095bf3adade695
Merge "unpackbootimg: remove host LOCAL_MODULE_TAG" into cm-10.1
Revert "init.rc: Create /storage mountpoint so Dalvik can mark as slave in zygotes"

This reverts commit 36454361efaa4d30a6c8c2cca49121e35ef74f7e, since the tmpfs is clobbering mountpoints created by init.hardware.rc. Most (all?) devices with non-emulated SDs are currently b0rked.

Change-Id: Ib34660e2d45473775757e94800fc4ec57f6c8d77
Merge "Revert "init.rc: Create /storage mountpoint so Dalvik can mark as slave in zygotes"" into cm-10.1
Merge remote-tracking branch 'upstream/cm-10.1' into HEAD