Add a tool to work on i915 hardware in user mode

This is the beginning of a tool that transforms the i9x5 code to user
mode code. Consider this a very early stage although it does produce
two programs. Requires spatch 1.0 or greater.

To try it out, assuming you have an up-to-date spatch,
   sh transform
   make
   make broken

Please don't fall to the temptation to auto-magicize this process.
It's primitive for a reason. That said, suggestions welcome of course.

Change-Id: I0188e36637b198b06c17f6d3c714d990e88bd57d
Signed-off-by: Ronald G. Minnich <rminnich@chromium.org>
Reviewed-on: http://review.coreboot.org/1003
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

util/i915tool/plusplusplus

@@ -0,0 +1,3 @@
+#!/bin/bash
+sed 's,^\+\+\+.*,+++ '$2',' < $1 > $1.pat
+