fix build - specific TARGET_ARCH

Change-Id: I104c6786c2f4135d77452d9b86e75c50b0a4b300
diff --git a/BoardConfig.mk b/BoardConfig.mk
index ddaff38..0dec0d0 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -19,6 +19,7 @@
 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