libhawaii: inherit hawaii-target os that libraries are found
libhawaii: inherit hawaii-target os that libraries are found

TBD: unprefixed header locations cause hawai-shell and
hawaii-system-preferences to fail during configuration.

Signed-off-by: Andreas Müller <d72a15aaaca3a7afa855175c72dc8d2e05931e32@googlemail.com>

schnitzeltony/meta-qt5-extra,schnitzeltony/meta-qt5-extra,schnitzeltony/meta-qt5-extra