Fix naming and shebang in Tools/Scripts

* Removes excess '.py'
* Removes incorrect #! on a '.pm' (Perl module, not executable)

R=dpranke

Review URL: https://codereview.chromium.org/239533008

git-svn-id: svn://svn.chromium.org/blink/trunk@171744 bbb929c8-8fbe-4397-9dbb-9b2b20218538