Fix Broken build 6978250 on aosp-master

Bug: 173570265
Change-Id: I3425dedf4ed8435420cca9b5917033262ba8b3cc
diff --git a/cc/config/vndk.go b/cc/config/vndk.go
index eb3d16f..563ce76 100644
--- a/cc/config/vndk.go
+++ b/cc/config/vndk.go
@@ -22,6 +22,7 @@
 	"android.hardware.light-ndk_platform",
 	"android.hardware.identity-ndk_platform",
 	"android.hardware.keymint-ndk_platform",
+	"android.hardware.keymint-unstable-ndk_platform",
 	"android.hardware.nfc@1.2",
 	"android.hardware.power-ndk_platform",
 	"android.hardware.rebootescrow-ndk_platform",