travis: install GitPython

Signed-off-by: jingru <[email protected]>

Author: wangnuannuan

.ci/script.sh

@@ -57,7 +57,7 @@ fi
 
 echo "Using ${TOOLCHAIN}-${TOOLCHAIN_VER}" || die
 # bash apply_embARC_patch.sh || die
-python ./scripts/patch.py --embarc-root. || die
+python ./scripts/patch.py --embarc-root . || die
 cd .ci || die
 if [ "${TOOLCHAIN}" == "sphinx" ] ; then
     bash deploy_doc.sh || die