UseSWIG: Do not set PREFIX property for SHARED and STATIC lua libraries

Modules/UseSWIG.cmake

@@ -294,7 +294,9 @@ macro(SWIG_ADD_LIBRARY name)
         set_target_properties (${SWIG_MODULE_${name}_REAL_NAME} PROPERTIES SUFFIX ".jnilib")
       endif ()
   elseif ("${swig_lowercase_language}" STREQUAL "lua")
-    set_target_properties(${SWIG_MODULE_${name}_REAL_NAME} PROPERTIES PREFIX "")
+    if("${_SAM_TYPE}" STREQUAL "MODULE")
+      set_target_properties(${SWIG_MODULE_${name}_REAL_NAME} PROPERTIES PREFIX "")
+    endif()
   elseif ("${swig_lowercase_language}" STREQUAL "python")
     # this is only needed for the python case where a _modulename.so is generated
     set_target_properties(${SWIG_MODULE_${name}_REAL_NAME} PROPERTIES PREFIX "")