New osmo-gsmtap-logsend utility

This utility can be used to "pipe" stdin or some file as log lines
via GSMTAP logging.

Change-Id: Ida96e87d84e0c349c5069edc67fec1c3cf19d1ab
diff --git a/debian/libosmocore-utils.install b/debian/libosmocore-utils.install
index 9501bec..0e41197 100644
--- a/debian/libosmocore-utils.install
+++ b/debian/libosmocore-utils.install
@@ -2,3 +2,4 @@
 usr/bin/osmo-auc-gen
 usr/bin/osmo-aka-verify
 usr/bin/osmo-config-merge
+usr/bin/osmo-gsmtap-logsend