[gnome-build-meta/cherry-pick-a5251e2d] sdk/librsvg.bst: Build docs

[Jordan Petridis <jpetridis src gnome org>]

commit af6358525fcf1b37799f32d35a3300d45bad9e75
Author: Jordan Petridis <jpetridis gnome org>
Date:   Fri Sep 28 01:24:20 2018 +0000

    sdk/librsvg.bst: Build docs
    
    
    (cherry picked from commit a5251e2de39ba45eb35b40e3f9f42bf4f01848ea)

 elements/sdk/librsvg.bst | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/elements/sdk/librsvg.bst b/elements/sdk/librsvg.bst
index 6332d1a..b5021f5 100644
--- a/elements/sdk/librsvg.bst
+++ b/elements/sdk/librsvg.bst
@@ -274,6 +274,8 @@ depends:
   junction: freedesktop-sdk.bst
   type: runtime
 variables:
-  conf-local: --enable-vala
+  conf-local: |
+      --enable-gtk-doc \
+      --enable-vala
 environment:
   PATH: /usr/bin:/usr/lib/sdk/rust/bin