meta-rcar-3 setup: Improve error message

meta-rcar-3 setup: Improve error message

If graphics and multimedia acceleration packege is not located in
your Download directory, the error message is shown by red color.

v2:
 Using tput instead of ANSI escape codes.

v3:
 rebase after update BSP v2.19

Change-Id: Ica0c0ca557dd6b039cedc3bb45e6389f20fcd20f
Signed-off-by: Harunobu Kurokawa <harunobu.kurokawa.dn@renesas.com>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/9415
Tested-by: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-build: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>