exynos5410: add exynos5410 makefile
exynos5410: only build for insignal SLSI variant
libhwc: disable DRM

* ODROID header doesn't support the gralloc flag in libhwc
libhwjpeg: add alternate function prototypes

* i9500 liboemcamera requires the class to export symbols that deal with
  buffers as char * types.