[PATCH] Add a new utility script that helps update very simple regression tests.

[Eric Christopher]

LGTM with some comments for the regexes and the spot I pointed out otherwise.

Thanks!

-eric


================
Comment at: utils/update_llc_test_checks.py:166
@@ +165,3 @@
+
+      if is_in_function:
+        if l.strip() == ';':
----------------
Comment this bit?

http://reviews.llvm.org/D5546

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