Fix python scripts in src/tools/

Make sure that:
- shebang is only present for executable files
- shebang is #!/usr/bin/env python
- __main__ is only present for executable files
- file's executable bit is coherent

Also fix EOF LF to be only one.

TBR=timurrrr@chromium.org
BUG=105108
TEST=

Review URL: http://codereview.chromium.org/8678023

Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: cb155a802bdc49cfafea1c41e0f0a92168f1da09
8 files changed
tree: ef1cef1b529fb957712b70bc8ce9873b4b4ed2a2
  1. google/