meson.recipe: Add support for VS2019

Bumping to 0.50.1 would also work, but it's too close to the 1.16
release to do that.

recipes/build-tools/meson.recipe

@@ -18,6 +18,9 @@ class Recipe(recipe.Recipe):
         'meson/0001-find_library-Check-arch-of-libraries-on-Darwin.patch',
         # https://github.com/mesonbuild/meson/pull/4864, in 0.50
         'meson/0001-macos-lipo-outputs-aarch64-as-arm64-fix-it.patch'
+        # https://github.com/mesonbuild/meson/pull/5274, fixed in 0.50.1
+        # Not actually in 0.50.1, but it's just not needed in 0.50.*
+        'meson/0001-meson-Add-a-quick-hack-to-support-VS2019.patch'
     ]
     deps = ['ninja']
 

recipes/build-tools/meson/0001-meson-Add-a-quick-hack-to-support-VS2019.patch

+From db6157bd3d21b1e807fe918e5a352b216660d548 Mon Sep 17 00:00:00 2001
+From: Nirbheek Chauhan <nirbheek@centricular.com>
+Date: Wed, 17 Apr 2019 18:54:26 +0530
+Subject: [PATCH] meson: Add a quick-hack to support VS2019
+
+Proper support is already upstream in 0.50.1, but it's too close to
+the 1.16 release to bump to that.
+---
+ mesonbuild/compilers/c.py | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/mesonbuild/compilers/c.py b/mesonbuild/compilers/c.py
+index 655dfb3..d47694e 100644
+--- a/mesonbuild/compilers/c.py
++++ b/mesonbuild/compilers/c.py
+@@ -1563,6 +1563,8 @@ class VisualStudioCCompiler(CCompiler):
+             return '14.0' # (Visual Studio 2015)
+         elif version < 1920:
+             return '14.1' # (Visual Studio 2017)
++        elif version < 1930:
++            return '14.2' # (Visual Studio 2017)
+         return None
+ 
+     def get_default_include_dirs(self):
+-- 
+2.20.1.windows.1
+