Use 3rdparty headers from the submodule
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6292c52..fb1de81 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -189,7 +189,7 @@
     endif(ZLIB_FOUND)
 endif(ENABLE_ZLIB_SUPPORT)
 
-add_subdirectory(3rdparty)
+add_subdirectory(crypto/3rdparty)
 include_directories(${thirdparty_inc})
 list(APPEND libs ${thirdparty_lib})
 add_definitions(${thirdparty_def})