Change purpose set in generate-squashfs

Resolves openbmc/openbmc#1668

Change-Id: I135fdbb1c2bc749439a27686f2d7f88ab195290d
Signed-off-by: Leonel Gonzalez <lgonzalez@us.ibm.com>
diff --git a/generate-squashfs b/generate-squashfs
index 0bb112e..9eb6fea 100755
--- a/generate-squashfs
+++ b/generate-squashfs
@@ -119,7 +119,7 @@
 
 echo "Creating MANIFEST for the image"
 manifest_location="MANIFEST"
-echo -e "purpose=host\nversion=$version\n\
+echo -e "purpose=xyz.openbmc_project.Software.Version.VersionPurpose.Host\nversion=$version\n\
 extended_version=$extended_version" >> $manifest_location
 
 echo "Generating tarball to contain the SquashFS image and its MANIFEST"