dragon: Update prebuilt kernel to 77438cebffb1b5e6fe5e9687e5eca2893af5bcf8

Build: trybot-smaug-paladin/R50-7897.1.0-b784

Changes include:
* 77438ce UPSTREAM: ALSA: timer: Harden slave timer list handling

Change-Id: I990105cb3b80f6f92f5899a9ece7f17608465842
diff --git a/Image.fit b/Image.fit
index 5c16097..d451499 100644
--- a/Image.fit
+++ b/Image.fit
Binary files differ