meson: Patch around overly strict struct size check.

Fixes systemd cross-compile.

pkgs/development/tools/build-managers/meson/default.nix

@@ -43,6 +43,10 @@ in python3Packages.buildPythonApplication rec {
       src = ./fix-rpath.patch;
       inherit (builtins) storeDir;
     })
+
+    # No one will ever need more than 128 bytes of data structure
+    # https://github.com/mesonbuild/meson/issues/3113
+    ./overly-strict-size-check.patch
   ];
 
   setupHook = ./setup-hook.sh;

pkgs/development/tools/build-managers/meson/overly-strict-size-check.patch

@@ -0,0 +1,12 @@
+diff -Naur a/mesonbuild/compilers/c.py b/mesonbuild/compilers/c.py
+--- a/mesonbuild/compilers/c.py	2017-12-10 08:37:19.000000000 -0500
++++ b/mesonbuild/compilers/c.py	2018-03-24 07:46:04.739929307 -0400
+@@ -406,7 +406,7 @@
+         }}'''
+         if not self.compiles(t.format(**fargs), env, extra_args, dependencies):
+             return -1
+-        return self.cross_compute_int('sizeof(%s)' % typename, 1, 128, None, prefix, env, extra_args, dependencies)
++        return self.cross_compute_int('sizeof(%s)' % typename, 1, 1024, None, prefix, env, extra_args, dependencies)
+ 
+     def sizeof(self, typename, prefix, env, extra_args=None, dependencies=None):
+         if extra_args is None: