design: add GC pacer redesign

For golang/go#44167.

Change-Id: I468aa78edb8588b4e48008ad44cecc08544a8f48
Reviewed-on: https://go-review.googlesource.com/c/proposal/+/290489
Reviewed-by: Michael Pratt <[email protected]>
Reviewed-by: Jeremy Faller <[email protected]>

Author: mknyszek

design/44167-gc-pacer-redesign.md

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+for input in *.svg; do
+	output=${input%.*}.png
+	google-chrome --headless --window-size=1920,1080 --disable-gpu --screenshot $input
+	convert screenshot.png -trim $output
+done
+rm screenshot.png