Force everything to use python3 for consistency.
Rather than "whatever people have installed as 'python' on their machine".
I've removed check-symbols.py because that's been broken for years and
we never even noticed, and I'm not sure it's worth fixing.
Test: treehugger, manual
Change-Id: Ieb996bbdf790a18d4b1fb46a409cc240ba2a2a49
diff --git a/libc/kernel/tools/cpp.py b/libc/kernel/tools/cpp.py
index 8538eb0..9f53453 100755
--- a/libc/kernel/tools/cpp.py
+++ b/libc/kernel/tools/cpp.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
"""A glorified C pre-processor parser."""
import ctypes