fixup! script option: fix IndentationError with buildout 2, if some lines are indented.

slapos/recipe/build/__init__.py

@@ -275,7 +275,7 @@ class Script(EnvironMixin):
     if self.script:
       if self.options.get('format', 'yes') in TRUE_LIST:
         self.script = self.script % self.options
-      if re.match(r'^\s', self.script):
+      if re.match(r'^[ \t]', self.script):
         # Buildout 2 keeps all indentation unless all lines have the same indentation.
         self.script = 'if True:\n' + self.script
     if self.options.get('keep-on-error', '').strip().lower() in TRUE_LIST: