New formula: vgmstream

Closes Homebrew/homebrew#8199.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

Formula/vgmstream.rb

@@ -0,0 +1,18 @@
+require 'formula'
+
+class Vgmstream < Formula
+  url 'https://vgmstream.svn.sourceforge.net/svnroot/vgmstream',
+    :using => UnsafeSubversionDownloadStrategy, :revision => 967
+  homepage 'http://hcs64.com/vgmstream.html'
+  version 'r967'
+
+  depends_on 'mpg123'
+  depends_on 'libvorbis'
+
+  def install
+    Dir.chdir "test"
+    system "make"
+    bin.install "test" => "vgmstream"
+    lib.install "../src/libvgmstream.a"
+  end
+end