Enable TARGET_2ND_ARCH_VARIANT := armv7-a for vts build

Vts release package is not compatible with cortext-a7(armv7-a) cores.
Build vts with TARGET_2ND_ARCH_VARIANT := armv7-a instead of armv8-a.

Bug: 116070933
Test: run vts -m VtsHalBaseV1_0TargetTest on cortext-a7 platform
Change-Id: I8089856223bac5129ad807496ad78b2cbfe1cc8a
diff --git a/target/board/generic_arm64/BoardConfig.mk b/target/board/generic_arm64/BoardConfig.mk
index c1983ad..25e51ba 100644
--- a/target/board/generic_arm64/BoardConfig.mk
+++ b/target/board/generic_arm64/BoardConfig.mk
@@ -23,7 +23,7 @@
 TARGET_2ND_CPU_ABI := armeabi-v7a
 TARGET_2ND_CPU_ABI2 := armeabi
 
-ifneq ($(TARGET_BUILD_APPS)$(filter cts sdk,$(MAKECMDGOALS)),)
+ifneq ($(TARGET_BUILD_APPS)$(filter cts vts sdk,$(MAKECMDGOALS)),)
 # DO NOT USE
 # DO NOT USE
 #