tools/examples: hardcode #!/usr/bin/python shebang
diff --git a/tools/filelife.py b/tools/filelife.py
index 4095273..f66f00b 100755
--- a/tools/filelife.py
+++ b/tools/filelife.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python
 # @lint-avoid-python-3-compatibility-imports
 #
 # filelife    Trace the lifespan of short-lived files.