Adding TARGET_CPU_VARIANT to config file.

Bug: 8005082

Merge from internal master.

Change-Id: I50f0d33addb858b0c0510f97b4a1abb8bd9a4691
diff --git a/BoardConfig.mk b/BoardConfig.mk
index 58f877a..1e6d96a 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -30,6 +30,7 @@
 TARGET_CPU_SMP := true
 TARGET_ARCH := arm
 TARGET_ARCH_VARIANT := armv7-a-neon
+TARGET_CPU_VARIANT := cortex-a9
 ARCH_ARM_HAVE_TLS_REGISTER := true
 
 TARGET_NO_BOOTLOADER := true