modify some ligic mistake

CMakeLists.txt

 cmake_minimum_required(VERSION 3.0)
 project(paddle-mobile)
 
-option(DEBUGING "enable debug mode" ON)
+option(DEBUGING "enable debug mode" OFF)
 option(USE_OPENMP "openmp support" OFF)
 
 if (DEBUGING)
+    set(CMAKE_BUILD_TYPE Debug)
+else()
     set(CMAKE_BUILD_TYPE Release)
-    else()
-    set(CMAKE_BUILD_TYPE debug)
 endif ()
 
 if(DEBUGING)
-    add_definitions(-fvisibility=hidden -fvisibility-inlines-hidden)
-    add_definitions(-fno-exceptions)
-else()
+    message(STATUS "debuging")
     add_definitions(-DPADDLE_MOBILE_DEBUG)
     add_definitions(-DENABLE_EXCEPTION)
+else()
+    message(STATUS "releasing")
+    add_definitions(-fvisibility=hidden -fvisibility-inlines-hidden)
+    add_definitions(-fno-exceptions)
 endif()
 
 if(IS_MAC)