Set BUILD_BROKEN_VENDOR_PROPERTY_NAMESPACE for goldfish

device/generic/goldfish/sepolicy/common/property_contexts still contains
violations, so temporarily setting build_broken to relax vendor property
check.

Bug: 176210699
Test: m vendor_property_contexts
Change-Id: Ia7d7830a7e994fd0766fd8854524bb6f9fa5cce6
diff --git a/target/board/BoardConfigEmuCommon.mk b/target/board/BoardConfigEmuCommon.mk
index 342abd7..fe0293b 100644
--- a/target/board/BoardConfigEmuCommon.mk
+++ b/target/board/BoardConfigEmuCommon.mk
@@ -90,3 +90,6 @@
 DEVICE_MATRIX_FILE   := device/generic/goldfish/compatibility_matrix.xml
 
 BOARD_SEPOLICY_DIRS += device/generic/goldfish/sepolicy/common
+
+# b/176210699: remove this
+BUILD_BROKEN_VENDOR_PROPERTY_NAMESPACE := true