Revert [test] Remove locale dependency for mri-utf8.test

This reverts r373700 (git commit b455ebf921)

llvm-svn: 373728

llvm/test/tools/llvm-ar/mri-utf8.test

@@ -12,4 +12,8 @@ RUN: echo "SAVE" >> %t/script.mri
 RUN: llvm-ar -M < %t/script.mri
 RUN: cd %t/extracted && llvm-ar x %t/mri.ar
 
-RUN: %python -c "assert open(b'\xC2\xA3.txt', 'rb').read() == b'contents\n'"
+# This works around problems launching processess that
+# include arguments with non-ascii characters.
+# Python on Linux defaults to ASCII encoding unless the
+# environment specifies otherwise, so it is explicitly set.
+RUN: env LANG=en_US.UTF-8 %python -c "assert open(u'\U000000A3.txt', 'rb').read() == b'contents\n'"