[OE-core] [PATCH] selftest: wic: Add APPEND to the optional variables list

[Kevin Hao]

The APPEND is an optional variable, so add it to the optional variables
list to make the wic selftest happy.

Signed-off-by: Kevin Hao <kexin.hao at windriver.com>
---
 meta/lib/oeqa/selftest/cases/wic.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/meta/lib/oeqa/selftest/cases/wic.py b/meta/lib/oeqa/selftest/cases/wic.py
index 46cd98b1934d..626a217e69fa 100644
--- a/meta/lib/oeqa/selftest/cases/wic.py
+++ b/meta/lib/oeqa/selftest/cases/wic.py
@@ -537,7 +537,8 @@ class Wic2(WicTestCase):
         # filter out optional variables
         wicvars = wicvars.difference(('DEPLOY_DIR_IMAGE', 'IMAGE_BOOT_FILES',
                                       'INITRD', 'INITRD_LIVE', 'ISODIR','INITRAMFS_IMAGE',
-                                      'INITRAMFS_IMAGE_BUNDLE', 'INITRAMFS_LINK_NAME'))
+                                      'INITRAMFS_IMAGE_BUNDLE', 'INITRAMFS_LINK_NAME',
+                                      'APPEND'))
         with open(path) as envfile:
             content = dict(line.split("=", 1) for line in envfile)
             # test if variables used by wic present in the .env file
-- 
2.25.0.389.gbfdd66e72fff