In order to allow the ArmVirtPkg platforms to be built using the
NOOPT target, add it explicitly to the BUILD_TARGETS define.
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>