Merging r258891:

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r258891 | hans | 2016-01-26 16:19:05 -0800 (Tue, 26 Jan 2016) | 25 lines

test-release.sh: Ignore LC_CTYPE in sed invocation on Darwin

Here, sed is used to prepare object files for comparison via cmp. On my Darwin
15.4.0 machine, LC_CTYPE is set to UTF-8 (by default, I believe). Under these
circumstances, anything sed is made to read will be treated as UTF-8, prompting
it to signal an error if it is not, like so:

% sed s/a/b/ <(head -n1 /dev/random) >/dev/null; echo $?
sed: RE error: illegal byte sequence
1
%

To make sed work as expected, I need to set LC_CTYPE to C:

% env LC_CTYPE=C sed s/a/b/ <(head -n1 /dev/random) >/dev/null; echo $?
0
%

Without this change, sed will exit with an error for every single file that it
compares between phase 2 and phase 3, thereby making it look as if the
differences were far larger than they are.

Patch by Elias Pipping!

Differential Revision: http://reviews.llvm.org/D16548
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_38@258892 91177308-0d34-0410-b5e6-96231b3b80d8