[shotwell] build: Use newer Meson syntax for quoted strings

[Jens Georg <jensgeorg src gnome org>]

commit 7c2a60ff8c6dbc77c0340217a702f8098a017325
Author: Jens Georg <mail jensge org>
Date:   Wed Sep 19 10:30:53 2018 +0200

    build: Use newer Meson syntax for quoted strings

 meson.build | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)
---
diff --git a/meson.build b/meson.build
index dc6d4788..dbe13f53 100644
--- a/meson.build
+++ b/meson.build
@@ -7,12 +7,12 @@ gnome = import('gnome')
 i18n = import('i18n')
 
 conf = configuration_data()
-conf.set('GETTEXT_PACKAGE', '"@0@"'.format(meson.project_name().to_lower()))
-conf.set('_VERSION', '"@0@"'.format(meson.project_version()))
-conf.set('_PREFIX', '"@0@"'.format(get_option('prefix')))
-conf.set('_LANG_SUPPORT_DIR', '"@0@"'.format(join_paths(get_option('prefix'), get_option('localedir'))))
-conf.set('_LIBEXECDIR', '"@0@"'.format(join_paths(get_option('prefix'), get_option('libexecdir'))))
-conf.set('_LIB', '"@0@"'.format(join_paths(get_option('prefix'), get_option('libdir'))))
+conf.set_quoted('GETTEXT_PACKAGE', meson.project_name().to_lower())
+conf.set_quoted('_VERSION', meson.project_version())
+conf.set_quoted('_PREFIX', get_option('prefix'))
+conf.set_quoted('_LANG_SUPPORT_DIR', join_paths(get_option('prefix'), get_option('localedir')))
+conf.set_quoted('_LIBEXECDIR', join_paths(get_option('prefix'), get_option('libexecdir')))
+conf.set_quoted('_LIB', join_paths(get_option('prefix'), get_option('libdir')))
 configure_file(output : 'config.h', configuration: conf)
 
 config_incdir = include_directories('.')