package/gdal: switch to cmake build to fix libgeotiff detection

GDAL autoconf has wrong libgeotiff detection. It uses host's
library if installed instead of buildroot one.
Modern versions of gdal have no autoconf build scripts, just cmake only.

So move to cmake build variant.

Fixes: https://bugs.busybox.net/show_bug.cgi?id=15281

Signed-off-by: Maxim Kochetkov <fido_max@inbox.ru>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>