[gexiv2] doc: Let meson do the build/src thing

[Jens Georg <jensgeorg src gnome org>]

commit 3714a20ace5097f02cc6cdc33ba7f500a12309e3
Author: Jens Georg <mail jensge org>
Date:   Tue Oct 6 11:26:09 2020 +0200

    doc: Let meson do the build/src thing

 docs/reference/meson.build | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/docs/reference/meson.build b/docs/reference/meson.build
index 1b5dea1..457a2e3 100644
--- a/docs/reference/meson.build
+++ b/docs/reference/meson.build
@@ -2,7 +2,6 @@ subdir('xml')
 gnome.gtkdoc('gexiv2',
              main_xml : 'gexiv2-docs.xml',
              gobject_typesfile : 'gexiv2.types',
-             src_dir : [join_paths(meson.source_root(), 'gexiv2'),
-                        join_paths(meson.build_root(), 'gexiv2')],
+             src_dir : ['gexiv2'],
              dependencies : libgexiv2,
              install : true)