Rollup merge of rust-lang#107332 - chansuke:issue-107230, r=albertlar…

…san68

Fix wording from `rustbuild` to `bootstrap`

Fixes rust-lang#107230

src/bootstrap/bootstrap.py

@@ -712,7 +712,7 @@ def bootstrap_binary(self):
 
  def build_bootstrap(self, color):
  """Build bootstrap"""
- print("Building rustbuild")
+ print("Building bootstrap")
  build_dir = os.path.join(self.build_dir, "bootstrap")
  if self.clean and os.path.exists(build_dir):
  shutil.rmtree(build_dir)