Add .gitupstream file

Change-Id: If1898609519a4d90b0afae7feb647172813f3e19
diff --git a/.gitupstream b/.gitupstream
new file mode 100644
index 0000000..e787e01
--- /dev/null
+++ b/.gitupstream
@@ -0,0 +1 @@
+https://git.codelinaro.org/clo/la/platform/external/ant-wireless/hidl