[gnome-sdk-images] Only clean out the gtk-doc generated docs

[Alexander Larsson <alexl src gnome org>]

commit e17372b53e5f2588134ec0e66736d7ba22eb3b06
Author: Alexander Larsson <alexl redhat com>
Date:   Thu Mar 9 21:16:50 2017 +0100

    Only clean out the gtk-doc generated docs
    
    Not everything

 org.gnome.Sdk.json.in |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/org.gnome.Sdk.json.in b/org.gnome.Sdk.json.in
index 910a8b4..4c65bf2 100644
--- a/org.gnome.Sdk.json.in
+++ b/org.gnome.Sdk.json.in
@@ -31,7 +31,7 @@
     "cleanup": [ "/cache",
                  "/man",
                  "/share/man",
-                 "/share/gtk-doc",
+                 "/share/gtk-doc/html",
                  "/lib/systemd",
                  "*.la", "*.a"],
     "cleanup-commands": [ "touch -d @0 /usr/share/fonts",