Older QCOM devices don't support OVERLAY_COMMIT

Amend: Fix tab conversion

Ported from jellybean (was Change-Id: I9241adef001f26fb7611623a23e05e559589532f)

http://review.cyanogenmod.org/#/c/25388

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>

Change-Id: Ie2d4933343c36303357e303295e7e2fe589d6c03