[glib] meson: Fix installation of gdb autoload scripts v2

[Nirbheek Chauhan <nirbheekc src gnome org>]

commit 953a51d97bc07418fb9d1a5f3a5336d3c9022793
Author: Nirbheek Chauhan <nirbheek centricular com>
Date:   Thu Nov 2 10:22:39 2017 +0530

    meson: Fix installation of gdb autoload scripts v2
    
    `install:` is not a valid keyword argument for configure_file()

 glib/meson.build    |   17 +++++++++++------
 gobject/meson.build |    7 +------
 2 files changed, 12 insertions(+), 12 deletions(-)
---
diff --git a/glib/meson.build b/glib/meson.build
index debfee2..223b7fe 100644
--- a/glib/meson.build
+++ b/glib/meson.build
@@ -279,16 +279,21 @@ install_data('glib_gdb.py', install_dir : join_paths(glib_pkgdatadir, 'gdb'))
 
 gdb_conf = configuration_data()
 gdb_conf.set('datadir', glib_datadir)
-configure_file(
-  input: 'libglib-gdb.py.in',
-  output: 'libglib-2.0.so.@0 -gdb py'.format(library_version),
-  configuration: gdb_conf,
+# This is also used in gobject/meson.build
+if host_system != 'windows'
   # XXX: We add a leading './' because glib_libdir is an absolute path and we
   # need it to be a relative path so that join_paths appends it to the end.
-  install_dir: join_paths(glib_datadir, 'gdb', 'auto-load', './' + glib_libdir)
+  gdb_install_dir = join_paths(glib_datadir, 'gdb', 'auto-load', './' + glib_libdir)
+else
   # FIXME: Cannot install on Windows because the path will contain a drive
   # letter and colons are not allowed in paths.
-  install: host_system != 'windows',
+  gdb_install_dir = false
+endif
+configure_file(
+  input: 'libglib-gdb.py.in',
+  output: 'libglib-2.0.so.@0 -gdb py'.format(library_version),
+  configuration: gdb_conf,
+  install_dir: gdb_install_dir,
 )
 
 if enable_systemtap
diff --git a/gobject/meson.build b/gobject/meson.build
index dedc9fb..4a392c2 100644
--- a/gobject/meson.build
+++ b/gobject/meson.build
@@ -100,12 +100,7 @@ configure_file(
   input: 'libgobject-gdb.py.in',
   output: 'libgobject-2.0.so.@0 -gdb py'.format(library_version),
   configuration: gdb_conf,
-  # XXX: We add a leading './' because glib_libdir is an absolute path and we
-  # need it to be a relative path so that join_paths appends it to the end.
-  install_dir: join_paths(glib_datadir, 'gdb', 'auto-load', './' + glib_libdir)
-  # FIXME: Cannot install on Windows because the path will contain a drive
-  # letter and colons are not allowed in paths.
-  install: host_system != 'windows',
+  install_dir: gdb_install_dir,
 )
 
 if enable_systemtap