hikey: Add PRODUCT_BRAND := Android to change build fingerprint am: 3965adabd5
am: 29836ed821

Change-Id: I7a354744978c3eb346097d243f38f2477565fa95
diff --git a/hikey.mk b/hikey.mk
index 575b428..0a8065c 100644
--- a/hikey.mk
+++ b/hikey.mk
@@ -13,3 +13,4 @@
 # Overrides
 PRODUCT_NAME := hikey
 PRODUCT_DEVICE := hikey
+PRODUCT_BRAND := Android