debian: set compat level to 10

Set --no-parallel, as in v10 debhelper defaults to parallel building.
This is apparently not supported by simtrace2's Makefile, it leads to
multiple non-trivial build errors. In contrib/jenkins.sh we also don't
build multiple firmwares in parallel.

Related: OS#5958
Related: https://manpages.debian.org/testing/debhelper/debhelper-compat-upgrade-checklist.7.en.html
Change-Id: I49fcc4fe9d3e795f8c3514d35ff3e2beca2917d1

debian/compat

@@ -1 +1 @@
-9
+10

debian/control

@@ -1,8 +1,8 @@
 Source: simtrace2
-Maintainer: Harald Welte <laforge@gnumonks.org>
+Maintainer: Osmocom team <openbsc@lists.osmocom.org>
 Section: devel
 Priority: optional
-Build-Depends: debhelper (>= 9),
+Build-Depends: debhelper (>= 10),
                autotools-dev,
                autoconf,
                automake,

debian/rules

@@ -13,4 +13,4 @@ export DEB_LDFLAGS_MAINT_STRIP = -Wl,-Bsymbolic-functions
 
 
 %:
-	dh $@
+	dh $@ --no-parallel