Remove the libnos dependency if build without vendor

Bug: 277188968
Change-Id: I4f6aa64d30a58aebb3fca246d0705e7f540bebb8
diff --git a/dauntless/gsc.mk b/dauntless/gsc.mk
index 326fc6d..892f71a 100644
--- a/dauntless/gsc.mk
+++ b/dauntless/gsc.mk
@@ -1,5 +1,6 @@
 # Dauntless
 BOARD_VENDOR_SEPOLICY_DIRS += device/google/gs-common/dauntless/sepolicy
+ifneq ($(wildcard vendor),)
 PRODUCT_SOONG_NAMESPACES += vendor/google_nos/init/dauntless
 
 PRODUCT_PACKAGES += \
@@ -19,3 +20,4 @@
                           pwntest \
                           nugget_targeted_tests \
                           CitadelProvision
+endif
\ No newline at end of file