fixed out of source compile for db module on windows

modules/db/src/CMakeLists.txt

@@ -13,8 +13,8 @@ sqlite3.c
 module(NAME db SOURCES ${OST_DB_SOURCES} HEADERS ${OST_DB_HEADERS} 
        DEPENDS_ON ost_base)
 if(WIN32)
-  set_target_properties(ost_db PROPERTIES LINK_FLAGS "/DEF:sqlite3.def")
+  set_target_properties(ost_db PROPERTIES LINK_FLAGS "/DEF:${CMAKE_CURRENT_SOURCE_DIR}/sqlite3.def")
   add_definitions(/DSQLITE_ENABLE_COLUMN_METADATA)
 else(WIN32)
-  add_definitions(-DSQLITE_OMIT_LOAD_EXTENSION) 
+  add_definitions(-DSQLITE_OMIT_LOAD_EXTENSION)
 endif(WIN32)