Don't specify --version-script on Solaris / Illumos in CMakeLists.txt.

The Solaris / Illumos linker does not support --version-script.

CMakeLists.txt

@@ -202,7 +202,7 @@ endif()
 if(UNIX)
     # On unix-like platforms the library is almost always called libz
    set_target_properties(zlib zlibstatic PROPERTIES OUTPUT_NAME z)
-   if(NOT APPLE)
+   if(NOT APPLE AND NOT "${CMAKE_SYSTEM_NAME}" MATCHES "SunOS")
      set_target_properties(zlib PROPERTIES LINK_FLAGS "-Wl,--version-script,\"${CMAKE_CURRENT_SOURCE_DIR}/zlib.map\"")
    endif()
 elseif(BUILD_SHARED_LIBS AND WIN32)