* added build script conf support for cl-profiling (enables profiling of opencl kernel executions) and pocl (uses/links against the pocl library instead of the systems OpenCL library)
 * fixed the tccpp check (had the '_' still in from testing this ...)
 * renamed FLOOR_PROFILING -> FLOOR_CL_PROFILING
 * extended floor_conf.hpp(.in) with FLOOR_PROFILING (disabled by default)
 * removed an old pocl workaround (it's no longer necessary to define FLOOR_POCL)