Enable the SELinux dialog in Settings

Change-Id: Icc708416d062bc811c83bce0841331c84afcb3f6
diff --git a/config/common.mk b/config/common.mk
index d7ab81e..67c36ad 100644
--- a/config/common.mk
+++ b/config/common.mk
@@ -70,6 +70,9 @@
     ro.com.android.dateformat=MM-dd-yyyy \
     ro.com.android.dataroaming=false
 
+PRODUCT_PROPERTY_OVERRIDES += \
+    ro.build.selinux=1
+
 ifneq ($(TARGET_BUILD_VARIANT),eng)
 # Enable ADB authentication
 ADDITIONAL_DEFAULT_PROPERTIES += ro.adb.secure=1