fix #32 : 兼容新老版本mysql客户端

ZLToolKit @ 02d8b5df

-Subproject commit 1543d8dd9c983a02c15a3a5492b68a7ba42be9e0
+Subproject commit 02d8b5df6a93cc84b605a548220fd552061e66c5

CMakeLists.txt

@@ -61,6 +61,7 @@ find_package(MYSQL QUIET)
 if (MYSQL_FOUND AND ENABLE_MYSQL)
     message(STATUS "found library:${MYSQL_LIBRARIES},ENABLE_MYSQL defined")
     include_directories(${MYSQL_INCLUDE_DIR})
+    include_directories(${MYSQL_INCLUDE_DIR}/mysql)
     add_definitions(-DENABLE_MYSQL)
     list(APPEND LINK_LIB_LIST ${MYSQL_LIBRARIES})
 endif ()