add support for version scripts when using Sun's ld on Solaris. use $GREP to grep binary files, needed for autoit to build on Solaris. add support for both GNU and Sun ld version scripts. add version script maps to libclamunrar, libclamunrar_iface. Enumerate all symbols, Sun's ld doesn't support cl_* (only *). cli_decodesig needs a dummy definition on Solaris.