[gnome-builder] vala: use rpath when linking against libide

[Jeremy Bicha <jbicha src gnome org>]

commit 42fcc7a6fe04cd890c795da7c2ef7e77bc69d6d3
Author: Jeremy Bicha <jbicha ubuntu com>
Date:   Mon Aug 28 10:06:27 2017 -0400

    vala: use rpath when linking against libide
    
    https://bugzilla.gnome.org/show_bug.cgi?id=786913

 plugins/vala-pack/meson.build |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/plugins/vala-pack/meson.build b/plugins/vala-pack/meson.build
index 855592a..a281784 100644
--- a/plugins/vala-pack/meson.build
+++ b/plugins/vala-pack/meson.build
@@ -103,6 +103,7 @@ shared_module('vala-pack-plugin', vala_pack_sources,
   link_depends: plugin_link_deps,
   install: true,
   install_dir: plugindir,
+  install_rpath: pkglibdir_abs,
 )
 
 configure_file(