Configure Trusty VM as non-secure on Cuttlefish

This allows the KeyMint HALs in the cuttlefish host to set up
the attestation IDs.

Bug: 365092240
Test: atest VtsHalRemotelyProvisionedComponentTargetTest
Change-Id: Ifd712b1a4f4d3187e47ed1bdb77e39d2eee87325

project/generic-x86_64-inc.mk

diff --git a/project/generic-x86_64-inc.mk b/project/generic-x86_64-inc.mk
index c02e239..bce0606 100644
--- a/project/generic-x86_64-inc.mk
+++ b/project/generic-x86_64-inc.mk
@@ -50,6 +50,9 @@
 # Enable Secure Storage AIDL interface
 STORAGE_AIDL_ENABLED ?= true
 
+# Non-secure KeyMint Trusty VM is used on x86_64 / cuttlefish
+KEYMINT_TRUSTY_VM ?= nonsecure
+
 MODULES += \
 	trusty/kernel/lib/trusty \
 	trusty/kernel/services/apploader \