debian: Add packaging to master taken from fairwaves/master

There doesn't seem to be a reason why this shouldn't be in master.
The fairwaves/master branch is removing --march=native as well that
looks like a good idea as well.
diff --git a/debian/osmo-trx.install b/debian/osmo-trx.install
new file mode 100644
index 0000000..574e915
--- /dev/null
+++ b/debian/osmo-trx.install
@@ -0,0 +1 @@
+/usr/bin/osmo-trx