libpqxx: new package

Signed-off-by: James Knight <james.knight@rockwellcollins.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
diff --git a/package/Config.in b/package/Config.in
index f11ea9f..5584d36 100644
--- a/package/Config.in
+++ b/package/Config.in
@@ -899,6 +899,7 @@
 	source "package/gdbm/Config.in"
 	source "package/kompexsqlite/Config.in"
 	source "package/leveldb/Config.in"
+	source "package/libpqxx/Config.in"
 	source "package/mongodb/Config.in"
 	source "package/mysql/Config.in"
 	source "package/postgresql/Config.in"