integrate package version into dkms module as well

debian/dkms.conf.in

@@ -1,6 +1,6 @@
 PACKAGE_NAME="ngcp-mediaproxy-ng"
 PACKAGE_VERSION="__VERSION__"
-MAKE[0]="make -C ${kernel_source_dir} M=${dkms_tree}/${PACKAGE_NAME}/${PACKAGE_VERSION}/build"
+MAKE[0]="make -C ${kernel_source_dir} M=${dkms_tree}/${PACKAGE_NAME}/${PACKAGE_VERSION}/build MEDIAPROXY_VERSION=\"__VERSION__\""
 CLEAN="make -C ${kernel_source_dir} M=${dkms_tree}/${PACKAGE_NAME}/${PACKAGE_VERSION}/build clean"
 AUTOINSTALL=yes
 BUILT_MODULE_NAME[0]="xt_MEDIAPROXY"

kernel-module/Makefile

@@ -1,7 +1,8 @@
 PWD    := $(shell pwd)
 KSRC   ?= /lib/modules/$(shell uname -r)/build
 KBUILD := $(KSRC)
-EXTRA_CFLAGS += -DMEDIAPROXY_VERSION="\"$(shell dpkg-parsechangelog -l$(M)/../debian/changelog | awk '/^Version: / {print $$2}')\""
+MEDIAPROXY_VERSION = $(shell dpkg-parsechangelog -l$(M)/../debian/changelog | awk '/^Version: / {print $$2}')
+EXTRA_CFLAGS += -DMEDIAPROXY_VERSION="\"$(MEDIAPROXY_VERSION)\""
 
 obj-m        += xt_MEDIAPROXY.o