update osm2pgsql (fix admin_level parsing)

diff --git a/osm2pgsql b/osm2pgsql
index 3f136f1a6b484ab3f37a970e2717122f0a899d87..b0352aa8f15e2739ba36d72561854a2738123770 160000 (submodule)
--- a/osm2pgsql
+++ b/osm2pgsql
@@ -1 +1 @@
-Subproject commit 3f136f1a6b484ab3f37a970e2717122f0a899d87
+Subproject commit b0352aa8f15e2739ba36d72561854a2738123770