flashupdate: Add libhoth dependency

use libhoth talking to hoth to support bios key rotation

Tested:
Refer to bug comment

Fusion-Link:
http://fusion2/N/A

Google-Bug-Id: 425993058
Change-Id: I3d2c282442fd07eff0071a627d36c6b4043ae630
Signed-off-by: Dan Zhang <zhdaniel@google.com>
diff --git a/recipes-google/flashtools/flashupdate_git.bb b/recipes-google/flashtools/flashupdate_git.bb
index 4337486..8d3dc2c 100644
--- a/recipes-google/flashtools/flashupdate_git.bb
+++ b/recipes-google/flashtools/flashupdate_git.bb
@@ -10,6 +10,7 @@
 DEPENDS += "nlohmann-json"
 DEPENDS += "libcr51sign"
 DEPENDS += "flasher"
+DEPENDS += "libhoth"
 
 PACKAGES =+ "lib${BPN}"
 FILES:lib${BPN} = "${libdir}/lib*${SOLIBS}"