[gitg] meson: install generated files

[Alberto Fanjul <albfan src gnome org>]

commit 046945a021c056dc64aebfcba9721c4395bf8d39
Author: Alberto Fanjul <albertofanjul gmail com>
Date:   Sun Oct 28 00:05:56 2018 +0200

    meson: install generated files

 libgitg-ext/meson.build | 8 +++++++-
 libgitg/meson.build     | 8 +++++++-
 2 files changed, 14 insertions(+), 2 deletions(-)
---
diff --git a/libgitg-ext/meson.build b/libgitg-ext/meson.build
index 2750c6cd..784f36d3 100644
--- a/libgitg-ext/meson.build
+++ b/libgitg-ext/meson.build
@@ -49,7 +49,13 @@ libgitg_ext = shared_library(
   vala_gir: libgitg_ext_gir_name,
   link_args: common_ldflags,
   link_depends: symbol_map,
-  install: true
+  install: true,
+  install_dir: [
+    true,
+    true,
+    true,
+    true
+  ]
 )
 
 deps = [
diff --git a/libgitg/meson.build b/libgitg/meson.build
index 8837199c..1214f3fb 100644
--- a/libgitg/meson.build
+++ b/libgitg/meson.build
@@ -136,7 +136,13 @@ libgitg = shared_library(
   vala_gir: libgitg_gir_name,
   link_args: ldflags,
   link_depends: symbol_map,
-  install: true
+  install: true,
+  install_dir: [
+    true,
+    true,
+    true,
+    true
+  ]
 )
 
 libgitg_dep = declare_dependency(