kokoro: Update build to use the new manifest location

Change-Id: Iccb0c388f0cbc8fcc78ee34a3c4a901f277f6a4b
diff --git a/kokoro/build.sh b/kokoro/build.sh
index 819a74e..0a5659a 100644
--- a/kokoro/build.sh
+++ b/kokoro/build.sh
@@ -47,7 +47,7 @@
 
 pushd ${ROOTDIR}
 python3 ${ROOTDIR}/build/create_release_manifest.py \
-  -i ${ROOTDIR}/.repo/manifest.xml \
+  -i ${ROOTDIR}/manifest/enterprise.xml \
   -o ${PRODUCT_OUT}/manifest.xml
 popd