split gralloc.$(TARGET_PRODUCT)

Some of the functions in gralloc.$(TARGET_PRODUCT) can be reused.
Since one should not link against a HAL library, have gralloc.c
as gralloc.$(TARGET_PRODUCT) and extract the reusable code into
libgralloc_drm.

Change-Id: I08a6989bb0b191ec56662aa4a21f6da7aea6b24d
Signed-off-by: Adrian Marius Negreanu <adrian.m.negreanu@intel.com>
1 file changed