unzip: fix configure check for cross compilation

The original configure runs a generated binary to determine
features. This is not correct for cross compilation. So change
the runtime tests into compile-time tests to fix the issue.

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>