trusty:keybox: build the fake keybox for this platform am: f6ec31a9c3

Original change: https://android-review.googlesource.com/c/trusty/device/x86/generic-x86_64/+/2950525

Change-Id: Ie233bf5f8a1042806199c11fdc59d097c1a43ebf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
diff --git a/project/generic-x86_64-inc.mk b/project/generic-x86_64-inc.mk
index a29602b..7737910 100644
--- a/project/generic-x86_64-inc.mk
+++ b/project/generic-x86_64-inc.mk
@@ -64,6 +64,7 @@
 # On generic-x86_64 hwcrypto requires FAKE HWRNG and HWKEY services
 WITH_FAKE_HWRNG ?= true
 WITH_FAKE_HWKEY ?= true
+WITH_FAKE_KEYBOX ?= true
 
 ASLR ?= false