fix: transformer test uses gtest but no WITH_TESTING in cmake file

lite/api/CMakeLists.txt

@@ -383,6 +383,8 @@ if(NOT IOS)
         FPGA_DEPS ${fpga_kernels}
         X86_DEPS ${x86_kernels}
         CUDA_DEPS ${cuda_kernels})
+
+    if (WITH_TESTING)
         lite_cc_binary(test_transformer SRCS transform_test.cc DEPS paddle_api_full paddle_api_light gflags utils
             ${ops} ${host_kernels}
             ARM_DEPS ${arm_kernels}
@@ -393,6 +395,7 @@ if(NOT IOS)
             FPGA_DEPS ${fpga_kernels}
             X86_DEPS ${x86_kernels}
             CUDA_DEPS ${cuda_kernels})
+    endif()
 endif()
 
 #lite_cc_binary(cxx_api_bin SRCS cxx_api_bin.cc