TT#111150 Add a dpkg symbols file

This makes it easier to control what symbols require what version in a
more fine grained way, even though we pretty much force wholesale system
upgrades, but also helps tracking symbols additions and removals.

Change-Id: Ie787d4bfcb7fb47b361e81a2e9a9e3a9a41cf1e2

debian/ngcp-libtcap1.symbols

@@ -0,0 +1,7 @@
+libtcap.so.1 ngcp-libtcap1 #MINVER#
+ LIBTCAP_1@LIBTCAP_1 9.4.0.0+0~mr9.4.0.0
+ inap_extract@LIBTCAP_1 9.4.0.0+0~mr9.4.0.0
+ isup_convert_number@LIBTCAP_1 9.4.0.0+0~mr9.4.0.0
+ isup_convert_number_hex@LIBTCAP_1 9.4.0.0+0~mr9.4.0.0
+ tcap_encode_with_routing@LIBTCAP_1 9.4.0.0+0~mr9.4.0.0
+ tcap_extract@LIBTCAP_1 9.4.0.0+0~mr9.4.0.0