add

cmake/external_libs/gtest.cmake

@@ -11,7 +11,7 @@ if ((${CMAKE_INSTALL_PREFIX} STREQUAL /usr/local) OR
 endif()
 
 if (GE_PB_PKG)
-    set(REQ_URL "${GE_PB_PKG}/libs/gtest/release-1.8.0.tar.gz")
+    set(REQ_URL "${GE_PB_PKG}/libs/ge_gtest/release-1.8.0.tar.gz")
     set(MD5 "")
 elseif (ENABLE_GITEE)
     set(REQ_URL "https://gitee.com/mirrors/googletest/repository/archive/release-1.8.0.tar.gz")