GPU Calc: unit test cases for ABS

Need open macro NO_FALLBACK_TO_SWINTERP in formulagroupcl.cxx for test

AMLOEXT-47 BUG

Change-Id: Ie33b4e5fad47f58a33ecdb0405521e7df694148c
Signed-off-by: haochen <haochen@multicorewareinc.com>
Signed-off-by: I-Jui (Ray) Sung <ray@multicorewareinc.com>
GPU Calc: implement fix for ABS

AMLOEXT-47 FIX

Change-Id: I438ad01d717dbc34ea8bc45e8f6de4f7d0c2bf2c
Signed-off-by: haochen <haochen@multicorewareinc.com>
Signed-off-by: I-Jui (Ray) Sung <ray@multicorewareinc.com>