vxworksae.h (VXWORKSAE_TARGET_DIR): Rely on $WIND_BASE instead of designating a harcoded arbitrary home dir.

        * config/vxworksae.h (VXWORKSAE_TARGET_DIR): Rely on
        $WIND_BASE instead of designating a harcoded arbitrary home dir.
        (VXWORKS_ADDITIONAL_CPP_SPEC): Adjust callers.

From-SVN: r214792