[LNT] Python 3 support: Fix exec syntax

Replace python2-specific exec statements with calls to exec builtins.
This was produced by running futurize's stage1 lib2to3.fixes.fix_exec.

Reviewers: cmatthews, hubert.reinterpretcast, kristof.beyls

Reviewed By: hubert.reinterpretcast

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D67808

llvm-svn: 372474

Author: Thomas Preud'homme

lnt/tests/nt.py

@@ -543,7 +543,7 @@ def execute_test_modules(test_log, test_modules, test_module_variables,
         module_path = os.path.join(test_path, 'TestModule')
         module_file = open(module_path)
         try:
-            exec module_file in locals, globals
+            exec(module_file, locals, globals)
         except Exception:
             info = traceback.format_exc()
             fatal("unable to import test module: %r\n%s" % (