manifest: update mcuboot sha

mcuboot changes removing tinycrypt from prj.conf.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

Author: nashif

west.yml

@@ -310,7 +310,7 @@ manifest:
       groups:
         - crypto
     - name: mcuboot
-      revision: 4eba8087fa606db801455f14d185255bc8c49467
+      revision: pull/2387/head
       path: bootloader/mcuboot
       groups:
         - bootloader