qcom_display: add TARGET_PROVIDES_LIBLIGHT
copybit: Fix type conversion error for GCC 4.7

GCC 4.7 has stricter type conversion rules
display: Fix handling of QCOM_BSP
 gralloc: Add workaround for Jellybean camera drivers

* Arcee is smarter than I am, and discovered that we can simply swap
  two fields to ensure compatibility with Jellybean camera drivers
  having the metadata fields in the private_handle_t struct.
* Enable this by defining QCOM_BSP_CAMERA_ABI_HACK.