Add .gitupstream file

Change-Id: I38655afbf8b600f4b607d87251dc9d7b0afa8704
diff --git a/.gitupstream b/.gitupstream
new file mode 100644
index 0000000..93570d0
--- /dev/null
+++ b/.gitupstream
@@ -0,0 +1 @@
+https://git.codelinaro.org/clo/la/platform/vendor/qcom-opensource/healthd-ext