gzip: bump to version 1.9

Add reference to tarball signature and key.

Add license file hash.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/gzip/gzip.hash

@@ -1,2 +1,6 @@
 # Locally calculated after checking pgp signature
-sha256 ff1767ec444f71e5daf8972f6f8bf68cfcca1d2f76c248eb18e8741fc91dbbd3  gzip-1.8.tar.xz
+# https://ftp.gnu.org/gnu/gzip/gzip-1.9.tar.xz.sig
+# using key 155D3FC500C834486D1EEA677FD9FCCB000BEEEE
+sha256 ae506144fc198bd8f81f1f4ad19ce63d5a2d65e42333255977cf1dcf1479089a  gzip-1.9.tar.xz
+# Locally calculated
+sha256 8ceb4b9ee5adedde47b31e975c1d90c73ad27b6b165a1dcd80c7c545eb65b903  COPYING

package/gzip/gzip.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-GZIP_VERSION = 1.8
+GZIP_VERSION = 1.9
 GZIP_SOURCE = gzip-$(GZIP_VERSION).tar.xz
 GZIP_SITE = $(BR2_GNU_MIRROR)/gzip
 # Some other tools expect it to be in /bin