Rename os variable in bootstrap.py to avoid shadowing os module.

src/bootstrap/bootstrap.py

@@ -414,8 +414,8 @@ def build_triple(self):
         # The goal here is to come up with the same triple as LLVM would,
         # at least for the subset of platforms we're willing to target.
         if ostype == 'Linux':
-            os = subprocess.check_output(['uname', '-o']).strip().decode(default_encoding)
-            if os == 'Android':
+            os_from_sp = subprocess.check_output(['uname', '-o']).strip().decode(default_encoding)
+            if os_from_sp == 'Android':
                 ostype = 'linux-android'
             else:
                 ostype = 'unknown-linux-gnu'

x.py

@@ -9,7 +9,7 @@
 # option. This file may not be copied, modified, or distributed
 # except according to those terms.
 
-# This file is only a "symlink" to boostrap.py, all logic should go there.
+# This file is only a "symlink" to bootstrap.py, all logic should go there.
 
 import os
 import sys