Define TARGET_OUT_VENDOR_APPS_PRIVILEGED for 2nd arch

Build error when LOCAL_PROPRIETARY_MODULE, LOCAL_PRIVILEGED_MODULE,
and LOCAL_MULTILIB := 32 are set for a module in 64-bit build.

The patch adds path definition for
$(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_VENDOR_APPS_PRIVILEGED

Change-Id: I2fe0c0f28fb7e4a27defd3a1b04f84c8b296294f