license_image.bbclass: Don't attempt to symlink to the same file

Sometimes (that is, in all my builds) the lic_manifest_dir and
lic_manifest_symlink_dir end up pointing to the same file, resulting
in an error like this:
  Exception: FileExistsError: [Errno 17] File exists: '/.../tmp-glibc/deploy/licenses/my-image-tdkz15' -> '/.../tmp-glibc/deploy/licenses/my-image-tdkz15'

First check to see if this is the case before attempting to create
the link.

(From OE-Core rev: 50f83fb542065eaf7a20ac07b63ae06441ada180)

Signed-off-by: Mike Looijmans <mike.looijmans@topic.nl>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/meta/classes/license_image.bbclass b/meta/classes/license_image.bbclass
index 8fd88cfb2d..36ddd84805 100644
--- a/meta/classes/license_image.bbclass
+++ b/meta/classes/license_image.bbclass
@@ -210,7 +210,8 @@ def license_deployed_manifest(d):
             os.unlink(lic_manifest_symlink_dir)
 
         # create the image dir symlink
-        os.symlink(lic_manifest_dir, lic_manifest_symlink_dir)
+        if lic_manifest_dir != lic_manifest_symlink_dir:
+            os.symlink(lic_manifest_dir, lic_manifest_symlink_dir)
 
 def get_deployed_dependencies(d):
     """