[PATCH v2] image.bbclass: allow ISAR_RELEASE_CMD that produce space seperated vals

[claudius.heine.ext@siemens.com]

From: Claudius Heine <ch@denx.de>

Directly using `get_build_id` inside quotes resulted in an empty string,
so we take the detour via a variable.

Signed-off-by: Claudius Heine <ch@denx.de>
---
 meta/classes/image.bbclass | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/meta/classes/image.bbclass b/meta/classes/image.bbclass
index 6a5f0e9..ad78347 100644
--- a/meta/classes/image.bbclass
+++ b/meta/classes/image.bbclass
@@ -74,8 +74,9 @@ addtask rootfs before do_build after do_unpack
 do_rootfs[deptask] = "do_deploy_deb"
 
 do_mark_rootfs() {
+    BUILD_ID=$(get_build_id)
     update_etc_os_release \
-        --build-id $(get_build_id) --variant "${DESCRIPTION}" \
+        --build-id "${BUILD_ID}" --variant "${DESCRIPTION}" \
         "${IMAGE_ROOTFS}"
 }
 
-- 
2.18.0