SwigTest: Update for swig_add_library and add lua example

Tests/SwigTest/CMakeLists.txt

@@ -7,6 +7,7 @@ project(example_${language}_class)
 find_package(SWIG REQUIRED)
 include(${SWIG_USE_FILE})
 
+unset(SWIG_LANG_TYPE)
 if(${language} MATCHES python)
   find_package(PythonLibs)
   include_directories(${PYTHON_INCLUDE_PATH})
@@ -38,6 +39,12 @@ if(${language} MATCHES pike)
   include_directories(${PIKE_INCLUDE_PATH})
   set(SWIG_LANG_LIBRARIES ${PIKE_LIBRARY})
 endif()
+if(${language} MATCHES lua)
+  find_package(Lua)
+  include_directories(${LUA_INCLUDE_DIR})
+  set(SWIG_LANG_TYPE TYPE SHARED)
+  set(SWIG_LANG_LIBRARIES ${LUA_LIBRARIES})
+endif()
 
 include_directories(${CMAKE_CURRENT_SOURCE_DIR})
 
@@ -45,6 +52,8 @@ set(CMAKE_SWIG_FLAGS "")
 
 set_source_files_properties(example.i PROPERTIES CPLUSPLUS ON)
 set_source_files_properties(example.i PROPERTIES SWIG_FLAGS "-includeall")
-SWIG_ADD_MODULE(example "${language}"
-  example.i example.cxx)
+SWIG_ADD_LIBRARY(example
+                 LANGUAGE "${language}"
+                 ${SWIG_LANG_TYPE}
+                 SOURCES example.i example.cxx)
 SWIG_LINK_LIBRARIES(example ${SWIG_LANG_LIBRARIES})