mime: add mimetype for luks home dir

mime/io.systemd.xml

@@ -12,6 +12,12 @@
     <generic-icon name="application-x-addon"/>
     <glob pattern="*.confext.raw"/>
   </mime-type>
+  <mime-type type="application/x.systemd-home">
+    <sub-class-of type="application/vnd.efi.img"/>
+    <comment>Home Directory (LUKS)</comment>
+    <generic-icon name="user-home"/>
+    <glob pattern="*.home"/>
+  </mime-type>
   <mime-type type="application/x.systemd-journal">
     <comment>Journal Log File</comment>
     <magic>