Modify the sh-bang to run out-of-the-box for FreeBSDes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155230 91177308-0d34-0410-b5e6-96231b3b80d8

utils/release/findRegressions-nightly.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 import re, string, sys, os, time
 
 DEBUG = 0

utils/release/findRegressions-simple.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 import re, string, sys, os, time, math
 
 DEBUG = 0