Fix issues with running  and building new test suite on (small) zed platform.

adapt/os/ocpios/linux/include/OcpiOsPosixError.h: better posix error messages
adapt/os/ocpios/linux/src/OcpiOsClientSocket.cxx: ditto
adapt/os/ocpios/linux/src/OcpiOsPosixError.cxx: ditto
adapt/os/ocpios/linux/src/OcpiOsPosixError.cxx: ditto
adapt/os/ocpios/linux/src/OcpiOsServerSocket.cxx: ditto
components/cic_hpfilter_complex.test/Makefile: cleanup
components/cic_lpfilter_complex.test/Makefile: ditto
components/dds_complex.test/Makefile: fix for cross compiling
components/genExpected.test/Makefile: ditto
components/mixer_complex.test/Makefile: ditto
components/unit.test/Makefile: ditto
core/container/ctests/bin/src/run_tests.sh: remember first failure, enable valgrind
core/dataplane/rdma_driver_interface/interfaces/include/DtOsDataTypes.h: reduce default MAX SMBs
-- this smaller default enables container tests to pass on zed
core/dataplane/transport/impl/include/OcpiTransportConstants.h: sync up constants
core/local/util/misc/src/OcpiUtilException.cxx: valgrind leak on exceptions
platforms/zed/ocpizedsetup.sh: make "hostname" a reachable host in /etc/hosts
-- e.g. make: ping `hostname` work - needed for various OS tests
test-opencpi.sh: avoid requiring "make" to run tests (zed doesn't have it).
tools/cdk/include/rcc/linux-c6-x86_64=linux-zynq-arm.mk: fix c++ linking for cross compiling
tools/cdk/include/rcc/rcc-make.mk: ditto
tools/cdk/scripts/ocpisetup.sh: fix for cross compiling
core/local/util/property/include/OcpiUtilDataTypes.h: don't assume we have 16 byte alignment.
-- zed linux doesn't do that, and we really don't need it.
Enable Zynq/zed cross build to be done with dynamic libraries in addition to static ones

Makefile: add error messages when you try and cross build before native build on dev host
core/container/rcc/src/OcpiRccApplication.cxx: better error messages during DLL/SO loading
platforms/zed/ocpizedsetup.sh: initialize LD_LIBRARY_PATH so dynamic libs work
tools/cdk/include/rcc/rcc-worker.mk: link properly when libs are dynamic.