[gnome-boxes] build: Specify install_dir

[Felipe Borges <felipeborges src gnome org>]

commit 3dbd182082eb946fb8712c04ec991210c26dae78
Author: Felipe Borges <felipeborges gnome org>
Date:   Wed Sep 20 15:14:32 2017 +0200

    build: Specify install_dir
    
    This way jhbuild can build out of the source tree.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=783234

 src/meson.build |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/meson.build b/src/meson.build
index 5fa9809..60451e9 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -158,5 +158,6 @@ executable ('gnome-boxes', boxes_sources,
             vala_args: vala_args,
             c_args : c_args,
             dependencies: dependencies,
-            install: true
+            install: true,
+            install_dir: pkglibdir
 )