Fix build - Add TARGET_ARCH := arm

Change-Id: I442e2a75de2089ce193403f62745dab905caca76
diff --git a/BoardConfig.mk b/BoardConfig.mk
index 32e6fd7..6f4ed80 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -25,6 +25,7 @@
 TARGET_CPU_ABI := armeabi-v7a
 TARGET_CPU_ABI2 := armeabi
 TARGET_CPU_SMP := true
+TARGET_ARCH:= arm
 TARGET_ARCH_VARIANT := armv7-a-neon
 ARCH_ARM_HAVE_TLS_REGISTER := true