updated build environment, can atm only build on 32bit, also needs hl2sdk-manifests in the folder

PackageScript

@@ -7,9 +7,14 @@ builder.SetBuildFolder('package')
 
 # Add any folders you need to this list
 folder_list = [
-  'addons/sourcemod/extensions'
+  'addons/sourcemod/extensions',
 ]
 
+if 'x86_64' in Extension.target_archs:
+  folder_list.extend([
+    'addons/sourcemod/extensions/x64',
+  ])
+
 # Create the distribution folder hierarchy.
 folder_map = {}
 for folder in folder_list:
@@ -25,6 +30,10 @@ def CopyFiles(src, dest, files):
     source_path = os.path.join(builder.sourcePath, src, source_file)
     builder.AddCopy(source_path, dest_entry)
 
+
 # Copy binaries.
 for cxx_task in Extension.extensions:
-  builder.AddCopy(cxx_task.binary, folder_map['addons/sourcemod/extensions'])
+  if cxx_task.target.arch == 'x86_64':
+    builder.AddCopy(cxx_task.binary, folder_map['addons/sourcemod/extensions/x64'])
+  else:
+    builder.AddCopy(cxx_task.binary, folder_map['addons/sourcemod/extensions'])