exo: Use correct existing icon name for *Mail Reader*

Currently, no icon for the mail reader is shown in the application menu.
Add the patch to fix that [1].

Increment revision.

[1] https://bugzilla.xfce.org/show_bug.cgi?id=13711

exo.be0

@@ -1,6 +1,6 @@
 #!/usr/bin/env beesh
 
-# BEE_VERSION exo-0.10.7-0
+# BEE_VERSION exo-0.10.7-1
 
 ## this file was created by bee init and should be executed to build a
 ## bee-package. (Additional hints are located at the end of this file.)
@@ -15,7 +15,7 @@ SRCURL[0]="http://archive.xfce.org/src/xfce/exo/${PKGVERSION[2]}/exo-${PKGVERSIO
 ## Add URLs/pathes to patch files to the PATCHURL array.
 ## The sources will be patched in the order of the array.
 
-# PATCHURL+=()
+PATCHURL+=(/src/mariux/patches/0001-Use-freedesktop.org-mail-icon-name-compliant-Bug-137.patch)
 
 ###############################################################################
 ## Add filename patterns to the EXCLUDE array of files that should not