Add .gitupstream file

Change-Id: I6c325b293e5abe30a44adb2b047654a433c14dff
diff --git a/.gitupstream b/.gitupstream
new file mode 100644
index 0000000..23a3daa
--- /dev/null
+++ b/.gitupstream
@@ -0,0 +1 @@
+https://git.codelinaro.org/clo/la/platform/hardware/qcom/bt