Add CM Legal (1 of 2)

Allow defining a ro.cmlegal.url to for T&C and Privacy Policy

Change-Id: I45ffbdd9e472e258ed8c5a63dff0f3b9c7bc04e2
diff --git a/config/common.mk b/config/common.mk
index 1f61780..609b45d 100644
--- a/config/common.mk
+++ b/config/common.mk
@@ -293,7 +293,8 @@
 
 PRODUCT_PROPERTY_OVERRIDES += \
   ro.cm.version=$(CM_VERSION) \
-  ro.modversion=$(CM_VERSION)
+  ro.modversion=$(CM_VERSION) \
+  ro.cmlegal.url=http://www.cyanogenmod.org/docs/privacy
 
 -include vendor/cm-priv/keys/keys.mk