update osm2pgsql to 1.4.0 release

diff --git a/osm2pgsql b/osm2pgsql
index 8e9704f2d155172b7c5885c67892c27ac7521c5c..a65ab49f777b9785726117971d3a4140436d70aa 160000 (submodule)
--- a/osm2pgsql
+++ b/osm2pgsql
@@ -1 +1 @@
-Subproject commit 8e9704f2d155172b7c5885c67892c27ac7521c5c
+Subproject commit a65ab49f777b9785726117971d3a4140436d70aa