Add final newline check for requirements

Ensure that every line has a newline; particularly the last one.

Change-Id: I8cfa194461946fb78dc9ea0aa51cf6158d5bb81c

modules/jenkins/files/slave_scripts/project-requirements-change.py

@@ -43,6 +43,9 @@ class RequirementsList(object):
         if not os.path.exists(fn):
             return
         for line in open(fn):
+            if '\n' not in line:
+                raise Exception("Requirements file %s does not "
+                                "end with a newline." % fn)
             if '#' in line:
                 line = line[:line.find('#')]
             line = line.strip()