Add shader for Clamp_S32_Opaque_D32_filter_DX.

Adds a NEON optimized shader for S32_Opaque_D32_filter_DX when
running with clamped tile mode.
Improves performance of browser and many other applications.

Change-Id: Ic3d83bfd70c8b0c6c956482db5f3a08667655d6e
Signed-off-by: Henrik Smiding <henrik.smiding@stericsson.com>
Signed-off-by: Patrik Ryd <patrik.ryd@stericsson.com>