fix issue with poclcc failing to link when ICD is enabled, but ocl-icd is not found.
fix issue with poclcc failing to link when ICD is enabled, but ocl-icd is not found.

jrprice/pocl,rjodin/pocl,rjodin/pocl,Oblomov/pocl,rjodin/pocl,pocl/pocl,Oblomov/pocl,jrprice/pocl,franz/pocl,Oblomov/pocl,Oblomov/pocl,pocl/pocl,franz/pocl,jrprice/pocl,pocl/pocl,franz/pocl,franz/pocl,Oblomov/pocl,rjodin/pocl,pocl/pocl,franz/pocl,pocl/pocl,jrprice/pocl