[zion] Move port calls to new syscall process.

zion/CMakeLists.txt

@@ -30,6 +30,7 @@ add_executable(zion
   syscall/address_space.cpp
   syscall/channel.cpp
   syscall/memory_object.cpp
+  syscall/port.cpp
   syscall/process.cpp
   syscall/syscall.cpp
   syscall/syscall_enter.s