[gnome-builder] build: filter out private sources from gtk-doc

[Christian Hergert <chergert src gnome org>]

commit 942feb3d2029d4db2b2da0b5c519e07e9a0b44c5
Author: Christian Hergert <chergert redhat com>
Date:   Sun Nov 5 15:59:02 2017 -0800

    build: filter out private sources from gtk-doc

 doc/sdk/meson.build |   10 ++++------
 1 files changed, 4 insertions(+), 6 deletions(-)
---
diff --git a/doc/sdk/meson.build b/doc/sdk/meson.build
index 9652b3a..d510709 100644
--- a/doc/sdk/meson.build
+++ b/doc/sdk/meson.build
@@ -1,11 +1,9 @@
 subdir('xml')
 
-private_headers = [
-  'config.h',
-  'editorconfig-glib.h',
-  'modeline-parser.h',
-  '*-private.h',
-]
+private_headers = ['config.h']
+foreach source : libide_private_sources
+  private_headers += ['@0@/@1@'.format(meson.source_root(), source)]
+endforeach
 
 libdazzle_prefix = dependency('libdazzle-1.0').get_pkgconfig_variable('prefix')
 libdazzle_docpath = join_paths(libdazzle_prefix, 'share', 'gtk-doc', 'html')