zip: Fix LICENSE

The contents of the LICENSE file included in the current source code
package match those of Info-ZIP license, which seems to originate from
the year 2007:

  This is version 2007-Mar-4 of the Info-ZIP license.

(From OE-Core rev: 3739a1af61ff6f0faca23bb565f9e71666953715)

Signed-off-by: Niko Mauno <niko.mauno@vaisala.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/zip/zip_3.0.bb

@@ -3,7 +3,7 @@ HOMEPAGE = "http://www.info-zip.org"
 DESCRIPTION = "Info-ZIP's purpose is to provide free, portable, high-quality versions of the Zip and UnZip compressor-archiver utilities that are compatible with the DOS-based PKZIP by PKWARE, Inc."
 SECTION = "console/utils"
 
-LICENSE = "BSD-3-Clause"
+LICENSE = "Info-ZIP"
 LIC_FILES_CHKSUM = "file://LICENSE;md5=04d43c5d70b496c032308106e26ae17d"