package vtk: add patch headers

src/vtk-1-tryrun.patch

@@ -1,3 +1,6 @@
+# This file is part of mingw-cross-env.
+# See doc/index.html for further information.
+
 --- blubb	1970-01-01 01:00:00.000000000 +0100
 +++ VTK/TryRunResults.cmake	2011-09-27 08:44:04.563613261 +0200
 @@ -0,0 +1,97 @@

src/vtk-2-findfreetype.patch

@@ -1,3 +1,6 @@
+# This file is part of mingw-cross-env.
+# See doc/index.html for further information.
+
 --- VTK/CMake/FindFREETYPE.cmake.orig	2011-08-24 15:37:07.000000000 +0200
 +++ VTK/CMake/FindFREETYPE.cmake	2011-10-25 22:55:52.265702464 +0200
 @@ -15,6 +15,7 @@

src/vtk-3-compile-tools.patch

@@ -1,3 +1,9 @@
+# This file is part of mingw-cross-env.
+# See doc/index.html for further information.
+
+This patch has been taken from:
+http://www.vtk.org/Bug/view.php?id=12686
+
 --- VTK/Utilities/kwsys/CMakeLists.txt	2011-08-24 15:37:12.000000000 +0200
 +++ VTK/Utilities/kwsys/CMakeLists.txt	2011-10-30 00:06:06.402085234 +0200
 @@ -937,13 +937,20 @@