libgeotiff: add license information

[Peter: use X11-style instead of X-style]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libgeotiff/libgeotiff.mk

@@ -6,6 +6,8 @@
 
 LIBGEOTIFF_VERSION = 1.4.0
 LIBGEOTIFF_SITE = http://download.osgeo.org/geotiff/libgeotiff
+LIBGEOTIFF_LICENSE = X11-style, public domain
+LIBGEOTIFF_LICENSE_FILES = LICENSE
 LIBGEOTIFF_DEPENDENCIES = tiff host-pkgconf
 LIBGEOTIFF_INSTALL_STAGING = YES
 LIBGEOTIFF_AUTORECONF = YES