acpica-tools: 20181031 -> 20181213

Semi-automatic update generated by
https://github.com/ryantm/nixpkgs-update tools. This update was made
based on information from
https://repology.org/metapackage/acpica-tools/versions

pkgs/tools/system/acpica-tools/default.nix

@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "acpica-tools-${version}";
-  version = "20181031";
+  version = "20181213";
 
   src = fetchurl {
     url = "https://acpica.org/sites/acpica/files/acpica-unix-${version}.tar.gz";
-    sha256 = "1zz1lfrl1rihs47a0cirdp32p53297kjm0l27b4kvibb5b7pa3h9";
+    sha256 = "1vgqlv9pvxc52faxixpgz7hi1awqmj88bw5vqn3bldf6fmkh147w";
   };
 
   NIX_CFLAGS_COMPILE = "-O3";