update linux-headers

packages/l/linux-headers/xmake.lua

@@ -4,8 +4,14 @@ package("linux-headers")
     set_description("Header files of the Linux kernel")
     set_license("GPL-2.0-only")
 
-    add_urls("https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-$(version).tar.gz")
+    add_urls("https://cdn.kernel.org/pub/linux/kernel/$(version).tar.gz",
+             "https://mirrors.edge.kernel.org/pub/linux/kernel/$(version).tar.gz",
+             {version = function (version)
+                 return "v" .. version:major() .. ".x/linux-" .. version
+             end})
     add_versions("4.4.80", "291d844619b5e7c43bd5aa0b2c286274fc5ffe31494ba475f167a21157e88186")
+    add_versions("4.20.9", "b5de28fd594a01edacd06e53491ad0890293e5fbf98329346426cf6030ef1ea6")
+    add_versions("5.9.16", "b0d7abae88e5f91893627c645e680a95c818defd1b4fcaf3e2afb4b2b6b4ab86")
 
     on_install("linux", function (package)
         os.vrunv("make", {"headers_install", "INSTALL_HDR_PATH=" .. package:installdir()})