capnp 0.4.0

Closes Homebrew/homebrew#25891.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

Formula/capnp.rb

@@ -2,14 +2,14 @@ require 'formula'
 
 class Capnp < Formula
   homepage 'http://kentonv.github.io/capnproto/'
-  url 'http://capnproto.org/capnproto-c++-0.3.0.tar.gz'
-  sha1 '26152010298db40687bf1b18ff6a438986289a44'
+  url 'http://capnproto.org/capnproto-c++-0.4.0.tar.gz'
+  sha1 '1d356a0229a9c6b3665930a4b166b91cba03825b'
 
   fails_with :gcc do
     cause "Cap'n Proto requires C++11 support"
   end
 
-  fails_with :gcc_4_0 do
+  fails_with :gcc_4_7 do
     cause "Cap'n Proto requires C++11 support"
   end