OMAP4-common: Add TARGET_USES_LIBEXIF_COMPAT flag

See: https://gerrit.omnirom.org/#/c/7899

Change-Id: Ib27371d85e1cda983309aca8c12efd57a2b3ddd1
Merge pull request #1 from omnirom/android-4.4

OMAP4-common: Add TARGET_USES_LIBEXIF_COMPAT flag