add cl kernel for mobilenetssd 

update V2 for FPGA track

add cpu and gpu predict function

fix #1279 repair build.sh -xx with fetchop reference not found

add cpu and gpu predict function,optimize feed op kernel

fix zero variable nullptr in gemm_omp

add lock for SetCLPath function

enforce use gpu when gpu is on in CmakeList.  resloved #1262

fix #1276 add gru Sgemm_omp

fix #1274 fix numel < 0 when load memory 

repair bug of memory free and build cl path

Update FPGA V2 close #1268