Fix make with luarocks not working

Author: Frityet

spec/util.lua

@@ -182,8 +182,10 @@ function util.assert_line_by_line(s1, s2)
 end
 
 local vars_prefix = { util.os_set("LUA_PATH", util.os_path(package.path)) .. util.os_join }
+table.insert(vars_prefix, util.os_set("LUA_CPATH", util.os_path(package.cpath)) .. util.os_join)
 for i = 1, 4 do
    table.insert(vars_prefix, util.os_set("LUA_PATH_5_" .. tostring(i), util.os_path(package.path)) .. util.os_join)
+   table.insert(vars_prefix, util.os_set("LUA_CPATH_5_" .. tostring(i), util.os_path(package.cpath)) .. util.os_join)
 end
 
 local first_arg = 0

tl

@@ -10,8 +10,8 @@ do
    -- get the whole API into package.loaded
    require("teal")
 
+   require("tlcli.main")({...})
+
    -- but otherwise don't pollute package.path inadvertedly
    package.path = save_package_path
 end
-
-require("tlcli.main")({...})