Generate manifest for HyperV desktop images

Manifests are necessary for candidate checking in the
CPC automated workflow for building and publishing
HyperV desktop images. (#1940136)

debian/changelog

@@ -1,3 +1,11 @@
+livecd-rootfs (2.719.2) UNRELEASED; urgency=medium
+
+  [ Jason C. McDonald]
+  * Generate manifest for HyperV desktop image
+  (LP: #1940136) 
+
+ -- Jason C. McDonald <codemouse92@outlook.com>  Mon, 16 Aug 2021 12:16:19 -0700
+
 livecd-rootfs (2.719.1) hirsute; urgency=medium
 
   [ Thomas Bechtold ]

live-build/ubuntu/hooks/040-hyperv-desktop-images.binary

@@ -137,4 +137,7 @@ rm "$raw_img"
 
 apt-get install -y zip
 zip "$vhd_img.zip" "$vhd_img"
+
+create_manifest chroot "$vhd_img.zip.manifest"
+
 rm "$vhd_img"