generic_arm64: BOARD_VNDK_VERSION := current

Bug: 70694532
Bug: 69526027
Test: lunch sdk_gphone_arm64-userdebug, build, boot complete
    (unrelated /system/bin/sdcard crash)
Change-Id: I90a05f43caa479288b812075d06f57dae0a2fb2c
diff --git a/target/board/generic_arm64/BoardConfig.mk b/target/board/generic_arm64/BoardConfig.mk
index e066e3a..be8ea39 100644
--- a/target/board/generic_arm64/BoardConfig.mk
+++ b/target/board/generic_arm64/BoardConfig.mk
@@ -99,3 +99,5 @@
 # Enable A/B update
 TARGET_NO_RECOVERY := true
 BOARD_BUILD_SYSTEM_ROOT_IMAGE := true
+
+BOARD_VNDK_VERSION := current