debian: set compat level to 10

Related: OS#5958
Change-Id: Ib45ad7c44cdefa4c5acab2da09f24796253a133d
diff --git a/debian/control b/debian/control
index e302fda..9d879a2 100644
--- a/debian/control
+++ b/debian/control
@@ -2,7 +2,7 @@
 Section: net
 Priority: extra
 Maintainer: Osmocom team <openbsc@lists.osmocom.org>
-Build-Depends: debhelper (>=9),
+Build-Depends: debhelper (>= 10),
                dh-autoreconf,
                autotools-dev,
                autoconf,