meson.build: require Meson 0.47.2

Meson 0.47.1 suffers from a bug which breaks linking the MPD executable because the `-lpthread` flag is not propagated from our `thread.a`. See https://github.com/mesonbuild/meson/pull/3895 Closes #403

meson.build: require Meson 0.47.2
e3bc85d7 · Max Kellermann · 6f242836 · e3bc85d7 · e3bc85d7 · e3bc85d7
Commit e3bc85d7 authored Nov 04, 2018 by Max Kellermann
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NEWS NEWS +1 -0

user.rst doc/user.rst +1 -1

meson.build meson.build +1 -1

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--- a/NEWS
+++ b/NEWS
@@ -7,6 +7,7 @@ ver 0.21.1 (not yet released)
 * fix build failure on Linux-PowerPC
 * fix build failure on FreeBSD
 * eliminate DLL dependencies on Windows
+* require Meson 0.47.2 because a Meson 0.47.1 bug breaks our build

 ver 0.21 (2018/10/31)
 * configuration

--- a/doc/user.rst
+++ b/doc/user.rst
@@ -54,7 +54,7 @@ Download the source tarball from the `MPD home page <https://musicpd.org>`_ and 
 In any case, you need:

 * a C++14 compiler (e.g. gcc 6.0 or clang 3.9)
-* `Meson 0.47 <http://mesonbuild.com/>`__ and `Ninja
+* `Meson 0.47.2 <http://mesonbuild.com/>`__ and `Ninja
  <https://ninja-build.org/>`__
 * Boost 1.58
 * pkg-config 

--- a/meson.build
+++ b/meson.build
@@ -2,7 +2,7 @@ project(
  'mpd',
  ['c', 'cpp'],
  version: '0.21.1',
-  meson_version: '>= 0.47',
+  meson_version: '>= 0.47.2',
  default_options: [
    'c_std=c99',
    'cpp_std=c++14'