tools/zlib: update to 1.2.13

Switch to "https github.com" for downloading source files.

Release Announcements:
https://github.com/madler/zlib/releases/tag/v1.2.13

Signed-off-by: Nick Hainke <[email protected]>

tools/zlib/Makefile

@@ -8,13 +8,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=zlib
-PKG_VERSION:=1.2.12
+PKG_VERSION:=1.2.13
 PKG_RELEASE:=1
 
-PKG_SOURCE_PROTO:=git
-PKG_SOURCE_URL:=https://github.com/madler/zlib
-PKG_MIRROR_HASH:=a162fc219763635f0c1591ec515d4b08684e4b0bfb4b1c8e65e4eab18d597c27
-PKG_SOURCE_VERSION:=21767c654d31d2dccdde4330529775c6c5fd5389
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
+PKG_SOURCE_URL:=https://github.com/madler/zlib/releases/download/v$(PKG_VERSION)
+PKG_HASH:=d14c38e313afc35a9a8760dadf26042f51ea0f5d154b0630a31da0540107fb98
 
 PKG_LICENSE:=Zlib
 PKG_LICENSE_FILES:=README