Build tries to "install" UNIX-only qpidd and qpidd-primary script on Windows

The qpid/cpp/etc/CMakeLists.txt file has configure setups and an install step for the qpidd and qpidd-primary scripts which are only used on Linux. These steps are executed in the Windows build which ends up with an error:

– Installing: C:/qpid/0.22/qpid/packaging/windows/stage/bin/receiver.exe
– Installing: C:/qpid/0.22/qpid/packaging/windows/stage/bin/sender.exe
– Installing: C:/qpid/0.22/qpid/packaging/windows/stage/bin/qpid-txtest.exe
– Installing: C:/qpid/0.22/qpid/packaging/windows/stage/bin/qpidt
CMake Error at build/etc/cmake_install.cmake:31 (FILE):
file INSTALL cannot find file
"C:/qpid/0.22/qpid/packaging/windows/build/etc/qpidd" to install.
Call Stack (most recent call first):
build/cmake_install.cmake:66 (INCLUDE)