Update PureBoot images to beta 11

Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>

changelog.md

@@ -2,6 +2,15 @@
 
 This document provides a brief chronological summary of Purism Librem firmware releases, and the changes in each build/release.
 
+### PureBoot beta-11
+2019-12-02
+
+* Rebased on HEADS upstream master branch
+* Fixed issue with Qubes VMs failing to autostart on boot
+* Fixed graphical corruption/flicker when booting an OS
+* Fixed handing of distros which use bootloader spec (BLS) type grub config files (ie, Fedora 30/31)
+* Added 8-char min length for custom password in OEM reset
+
 ### coreboot 4.11-Purism-1
 2019-11-26