Upgrade xz and zstd.

tor-versions.json

@@ -14,11 +14,11 @@
     },
     "xz": {
       "url": "https://git.tukaani.org/xz.git",
-      "commit": "v5.2.10"
+      "commit": "v5.6.4"
     },
     "zlib": {
       "url": "https://github.com/madler/zlib.git",
-      "commit": "v1.2.12"
+      "commit": "v1.2.13"
     },
     "ndk": {
       "url": "https://dl.google.com/android/repository/android-ndk-r21e-linux-x86_64.zip",