[gxml] Fixing Meson project version

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit 73091802cd9f70eb50258398cb516ec789fb9c9b
Author: Daniel Espinosa <esodan gmail com>
Date:   Tue Nov 28 13:12:45 2017 -0600

    Fixing Meson project version

 configure.ac |  291 ----------------------------------------------------------
 meson.build  |    4 +-
 2 files changed, 2 insertions(+), 293 deletions(-)
---
diff --git a/meson.build b/meson.build
index 55d069f..dbb293f 100644
--- a/meson.build
+++ b/meson.build
@@ -1,8 +1,8 @@
-project('gxml', [ 'vala', 'c'], version : '0.15.0')
+project('gxml', [ 'vala', 'c'], version : '0.15.3')
 
 PROJECT_NAME = meson.project_name ()
 API_VERSION = '0.16'
-PROJECT_VERSION = '0.15.3'
+PROJECT_VERSION = meson.project_version ()
 VERSIONED_PROJECT_NAME = PROJECT_NAME+'-'+API_VERSION
 CAMEL_CASE_NAME = 'GXml'
 VERSIONED_CAMEL_CASE_NAME = CAMEL_CASE_NAME +'-'+ API_VERSION