improve debian xpack

Author: waruqi

xmake/actions/create/main.lua

@@ -98,6 +98,7 @@ function _create_project(language, templateid, targetname)
     local sourcedir = path.join(tempinst:scriptdir(), "project")
     if os.isdir(sourcedir) then
         for _, filedir in ipairs(os.filedirs(path.join(sourcedir, "*"))) do
+            -- https://github.com/xmake-io/xmake/issues/5138#issuecomment-2329238617
             os.cp(filedir, projectdir, {writeable = true})
             table.insert(filedirs, path.relative(filedir, sourcedir))
         end

xmake/plugins/pack/deb/main.lua

@@ -191,7 +191,7 @@ function _pack_deb(debuild, package)
     local debiandir = path.join(sourcedir, "debian")
     if not os.isdir(debiandir) then
         local debiandir_template = package:get("specfile") or path.join(os.programdir(), "scripts", "xpack", "deb", "debian")
-        os.cp(debiandir_template, debiandir)
+        os.cp(debiandir_template, debiandir, {writeable = true})
     end
 
     -- replace variables in specfile