[gnome-continuous] Disable gtk-doc when building NM

[Emmanuele Bassi <ebassi src gnome org>]

commit 14a8d1e614d4ed76a577bda8e35734858cff9385
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Mon Mar 20 08:51:21 2017 +0000

    Disable gtk-doc when building NM
    
    This should avoid build failures dealing with autogenerated
    documentation that we don't need.

 manifest.json |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/manifest.json b/manifest.json
index 69f17ca..2e68586 100644
--- a/manifest.json
+++ b/manifest.json
@@ -568,6 +568,7 @@
                                 "--with-session-tracking=systemd",
                                 "--with-crypto=nss",
                                 "--disable-doc",
+                                "--disable-gtk-doc",
                                 "--enable-more-warnings=yes",
                                 "--enable-modify-system"]},