luarocks: 3.0.4 -> 3.1.3

The newer version silences some superfluous warnings we were previously
getting in Nix builds using luarocks.

pkgs/development/tools/misc/luarocks/darwin-3.1.3.patch

@@ -1,20 +1,17 @@
 diff --git a/src/luarocks/core/cfg.lua b/src/luarocks/core/cfg.lua
-index f93e67a..2eb2db9 100644
+index c5af5a2..1949fdc 100644
 --- a/src/luarocks/core/cfg.lua
 +++ b/src/luarocks/core/cfg.lua
-@@ -425,9 +425,9 @@ local function make_defaults(lua_version, target_cpu, platforms, home)
+@@ -425,7 +425,7 @@ local function make_defaults(lua_version, target_cpu, platforms, home)
        defaults.external_lib_extension = "dylib"
        defaults.arch = "macosx-"..target_cpu
        defaults.variables.LIBFLAG = "-bundle -undefined dynamic_lookup -all_load"
--      defaults.variables.STAT = "/usr/bin/stat"
-+      defaults.variables.STAT = "stat"
-       defaults.variables.STATFLAG = "-f '%A'"
 -      local version = util.popen_read("sw_vers -productVersion")
 +      local version = "10.10"
        version = tonumber(version and version:match("^[^.]+%.([^.]+)")) or 3
        if version >= 10 then
           version = 8
-@@ -436,8 +436,8 @@ local function make_defaults(lua_version, target_cpu, platforms, home)
+@@ -434,8 +434,8 @@ local function make_defaults(lua_version, target_cpu, platforms, home)
        else
           defaults.gcc_rpath = false
        end

pkgs/development/tools/misc/luarocks/default.nix

@@ -9,14 +9,14 @@
 
 stdenv.mkDerivation rec {
   pname = "luarocks";
-  version = "3.0.4";
+  version = "3.1.3";
 
   src = fetchurl {
     url="http://luarocks.org/releases/luarocks-${version}.tar.gz";
-    sha256="1pqfzwvjy8dzqg4fqjq2cgqcr00fgrdd7nwzxm7nqmawr83s6dhj";
+    sha256="04q5k6drypsnbp1wspr9ns72k8kjf62a787a6jg1bb2s95gl6wy5";
   };
 
-  patches = [ ./darwin.patch ];
+  patches = [ ./darwin-3.1.3.patch ];
   preConfigure = ''
     lua -e "" || {
         luajit -e "" && {