[librsvg] doc/Makefile.am: Add include path builddir/librsvg

[Federico Mena Quintero <federico src gnome org>]

commit 28c224d2c491ca39e27e0e2b363aa22719fdf16f
Author: Federico Mena Quintero <federico gnome org>
Date:   Thu Aug 8 12:50:56 2019 -0500

    doc/Makefile.am: Add include path builddir/librsvg
    
    This is so that the generated rsvg-scan.c can find librsvg-features.h.

 doc/Makefile.am | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)
---
diff --git a/doc/Makefile.am b/doc/Makefile.am
index 841ec3a1..f412e2bd 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -94,12 +94,13 @@ expand_content_files =
 # signals and properties.
 # e.g. GTKDOC_CFLAGS=-I$(top_srcdir) -I$(top_builddir) $(GTK_DEBUG_FLAGS)
 # e.g. GTKDOC_LIBS=$(top_builddir)/gtk/$(gtktargetlib)
-GTKDOC_CFLAGS = \
-       -I$(top_srcdir) \
-       -I$(top_builddir) \
-       $(LIBRSVG_CFLAGS) \
-       $(WARN_CFLAGS) \
-       $(DISABLE_DEPRECATED) \
+GTKDOC_CFLAGS =                                        \
+       -I$(top_srcdir)                         \
+       -I$(top_builddir)                       \
+       -I$(top_builddir)/librsvg               \
+       $(LIBRSVG_CFLAGS)                       \
+       $(WARN_CFLAGS)                          \
+       $(DISABLE_DEPRECATED)                   \
        $(AM_CFLAGS)
 
 GTKDOC_LIBS = \