package/sysvinit: add version number to SYSVINIT_MAKE_OPTS

Version environment variable VERSION=$(VERSION) is set in the top level
Makefile of the sysvinit:
$(MAKE) VERSION=$(VERSION) -C src $@

Build command SYSVINIT_BUILD_CMDS doesn't use the top level Makefile, but
src/Makefile instead without setting the VERSION variable, which leads to
undefined VERSION macro in src/init.c.

Add VERSION=$(SYSVINIT_VERSION) to SYSVINIT_MAKE_OPTS to make the VERSION
environment variable available in the src/Makefile.

Signed-off-by: Cody Green <cody@londelec.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 954098b1423d3095112f49a6ac236ddb98236292)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/sysvinit/sysvinit.mk

@@ -11,7 +11,7 @@ SYSVINIT_LICENSE = GPL-2.0+
 SYSVINIT_LICENSE_FILES = COPYING
 SYSVINIT_CPE_ID_VALID = YES
 
-SYSVINIT_MAKE_OPTS = SYSROOT=$(STAGING_DIR)
+SYSVINIT_MAKE_OPTS = SYSROOT=$(STAGING_DIR) VERSION=$(SYSVINIT_VERSION)
 
 ifeq ($(BR2_PACKAGE_LIBSELINUX),y)
 SYSVINIT_DEPENDENCIES += libselinux