mindspore support gmock

cmake/external_libs/gtest.cmake

@@ -39,12 +39,13 @@ endif()
 
 mindspore_add_pkg(gtest
         VER 1.8.1
-        LIBS gtest
+        LIBS gtest gmock
         URL ${REQ_URL}
         MD5 ${MD5}
         CMAKE_OPTION ${CMAKE_OPTION})
 include_directories(${gtest_INC})
 add_library(mindspore::gtest ALIAS gtest::gtest)
+add_library(mindspore::gmock ALIAS gtest::gmock)
 if(CMAKE_SYSTEM_NAME MATCHES "Windows")
     file(COPY ${gtest_DIRPATH}/bin/libgtest${CMAKE_SHARED_LIBRARY_SUFFIX} DESTINATION
             ${CMAKE_BINARY_DIR}/googletest/googlemock/gtest)