Move bullhead to clang by default.

Bug: 23163853
Change-Id: Ia7b071c8c525aaf4c488905bc005b370a224fa6a
diff --git a/BoardConfig.mk b/BoardConfig.mk
index bae268d..2487583 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -143,4 +143,6 @@
 # Include an expanded selection of fonts
 EXTENDED_FONT_FOOTPRINT := true
 
+USE_CLANG_PLATFORM_BUILD := true
+
 -include vendor/lge/bullhead/BoardConfigVendor.mk