release.sh: Pass through NO_ROOT

To be specific, set NO_ROOT=1 WITHOUT_QEMU=1 (those options go
together and it is an error to specify one without the other) if
NO_ROOT is defined in release.conf.

MFC after:	3 days
Sponsored by:	https://www.patreon.com/cperciva

Author: cperciva

release/release.sh

@@ -200,6 +200,9 @@ env_check() {
 		WITH_DVD=${WITH_DVD} WITH_VMIMAGES=${WITH_VMIMAGES} \
 		WITH_CLOUDWARE=${WITH_CLOUDWARE} WITH_OCIIMAGES=${WITH_OCIIMAGES} \
 		XZ_THREADS=${XZ_THREADS} NOPKGBASE=${NOPKGBASE}"
+	if [ -n "${NO_ROOT}" ]; then
+		RELEASE_RMAKEFLAGS="${RELEASE_RMAKEFLAGS} NO_ROOT=1 WITHOUT_QEMU=1"
+	fi
 
 	return 0
 } # env_check()