New build flag BOARD_NEEDS_OLD_HWC_API

(cherry picked from commit 6b25ca19a320d699bb6b17419c041c5918229a1d)
Merge pull request #1 from rmkilc/cm-11.0

Change multiuser support to 5
(cherry picked from commit 0e058ff528d261b9155b503dfb47c4c38f75b528)
Add legacy 0 storage emulated link

(cherry picked from commit 8ad65573479eb9a2be3653cbdac99d4704dfcfc4)