update osm2pgsql (disable install rule)

diff --git a/osm2pgsql b/osm2pgsql
index a65ab49f777b9785726117971d3a4140436d70aa..497476d56f7c1fcbbdb95b363293de6ce0feac00 160000 (submodule)
--- a/osm2pgsql
+++ b/osm2pgsql
@@ -1 +1 @@
-Subproject commit a65ab49f777b9785726117971d3a4140436d70aa
+Subproject commit 497476d56f7c1fcbbdb95b363293de6ce0feac00