Revert "debian: Remove osmo-trx-usrp1 until we can build libusrp1.deb"

This reverts commit 295b938d51889d6db39251130642d45262ca039a, as we now
have libusrp built in OBS

Change-Id: Ia1311f1e236e6aea4acc08d3f234d53e46789cf9
diff --git a/debian/osmo-trx-usrp1.install b/debian/osmo-trx-usrp1.install
new file mode 100644
index 0000000..1b76249
--- /dev/null
+++ b/debian/osmo-trx-usrp1.install
@@ -0,0 +1 @@
+/usr/bin/osmo-trx-usrp1