update python 2.7.15 (#27457)

paddle/scripts/paddle_build.sh

@@ -140,18 +140,18 @@ function cmake_base() {
         if [ "$1" != "" ]; then
             echo "using python abi: $1"
             if [ "$1" == "cp27-cp27m" ]; then
-                export LD_LIBRARY_PATH=/opt/_internal/cpython-2.7.11-ucs2/lib:${LD_LIBRARY_PATH#/opt/_internal/cpython-2.7.11-ucs4/lib:}
+                export LD_LIBRARY_PATH=/opt/_internal/cpython-2.7.15-ucs2/lib:${LD_LIBRARY_PATH#/opt/_internal/cpython-2.7.15-ucs4/lib:}
                 export PATH=/opt/python/cp27-cp27m/bin/:${PATH}
                 PYTHON_FLAGS="-DPYTHON_EXECUTABLE:FILEPATH=/opt/python/cp27-cp27m/bin/python
             -DPYTHON_INCLUDE_DIR:PATH=/opt/python/cp27-cp27m/include/python2.7
-            -DPYTHON_LIBRARIES:FILEPATH=/opt/_internal/cpython-2.7.11-ucs2/lib/libpython2.7.so"
+            -DPYTHON_LIBRARIES:FILEPATH=/opt/_internal/cpython-2.7.15-ucs2/lib/libpython2.7.so"
                 pip install -r ${PADDLE_ROOT}/python/requirements.txt
             elif [ "$1" == "cp27-cp27mu" ]; then
-                export LD_LIBRARY_PATH=/opt/_internal/cpython-2.7.11-ucs4/lib:${LD_LIBRARY_PATH#/opt/_internal/cpython-2.7.11-ucs2/lib:}
+                export LD_LIBRARY_PATH=/opt/_internal/cpython-2.7.15-ucs4/lib:${LD_LIBRARY_PATH#/opt/_internal/cpython-2.7.15-ucs2/lib:}
                 export PATH=/opt/python/cp27-cp27mu/bin/:${PATH}
                 PYTHON_FLAGS="-DPYTHON_EXECUTABLE:FILEPATH=/opt/python/cp27-cp27mu/bin/python
             -DPYTHON_INCLUDE_DIR:PATH=/opt/python/cp27-cp27mu/include/python2.7
-            -DPYTHON_LIBRARIES:FILEPATH=/opt/_internal/cpython-2.7.11-ucs4/lib/libpython2.7.so"
+            -DPYTHON_LIBRARIES:FILEPATH=/opt/_internal/cpython-2.7.15-ucs4/lib/libpython2.7.so"
                 pip install -r ${PADDLE_ROOT}/python/requirements.txt
             elif [ "$1" == "cp27-cp27m-gcc82" ]; then
                 export LD_LIBRARY_PATH=/opt/_internal/cpython-2.7.15-ucs2/lib:${LD_LIBRARY_PATH#/opt/_internal/cpython-2.7.15-ucs4/lib:}