add path of libcuda.so.1 for cinn compilation (#50268)

paddle/scripts/paddle_build.sh

@@ -165,6 +165,8 @@ function cmake_base() {
                                      -DPYTHON_LIBRARIES:FILEPATH=/opt/conda/lib/libpython3.so"
                 /opt/conda/bin/pip install -r ${PADDLE_ROOT}/python/requirements.txt
             fi
+            # for CINN, to find libcuda.so.1
+            export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/usr/local/cuda-11.2/compat/
         else
             pip install -r ${PADDLE_ROOT}/python/requirements.txt
         fi