package/pigz: bump to version 2.7

- Use official tarball
- Update hash of README (version and date updated:
  https://github.com/madler/pigz/commit/cb8a432c91a1dbaee896cd1ad90be62e5d82d452)

https://zlib.net/pipermail/pigz-announce_zlib.net/2022-January/000017.html

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/pigz/pigz.hash

@@ -1,3 +1,5 @@
+# From http://zlib.net/pigz
+sha256  b4c9e60344a08d5db37ca7ad00a5b2c76ccb9556354b722d56d55ca7e8b1c707  pigz-2.7.tar.gz
+
 # Locally calculated
-sha256  577673676cd5c7219f94b236075451220bae3e1ca451cf849947a2998fbf5820  pigz-2.6.tar.gz
-sha256  830b3e1b05cc20f443d89d7d8703a3c63fd64c57ab716f5e81fd178517df1e11  README
+sha256  67e2b9e30e924724a9d72549a6004ed15a041f51d9ea9ab781e048fa27ae07a2  README

package/pigz/pigz.mk

@@ -4,8 +4,8 @@
 #
 ################################################################################
 
-PIGZ_VERSION = 2.6
-PIGZ_SITE = $(call github,madler,pigz,v$(PIGZ_VERSION))
+PIGZ_VERSION = 2.7
+PIGZ_SITE = http://zlib.net/pigz
 PIGZ_DEPENDENCIES = zlib
 HOST_PIGZ_DEPENDENCIES = host-zlib
 PIGZ_LICENSE = Zlib