use TOOLS_LIBDIR in definition of ZFCPDUMP_DIR
use TOOLS_LIBDIR in definition of ZFCPDUMP_DIR

Fixes: #6

Signed-off-by: Dan Horák <2591e5f46f28d303f9dc027d475a5c60d8dea17a@danny.cz>
Signed-off-by: Michael Holzheu <db4757c56f54651f568cc7cda79cd93c781b1605@linux.vnet.ibm.com>

ibm-s390-tools/s390-tools,ibm-s390-tools/s390-tools,ibm-s390-tools/s390-tools,ibm-s390-tools/s390-tools