[ARROW-2421] [C++] Update LLVM version in cpp README

• Type: Bug
• Status: Closed
• Priority: Trivial
• Resolution: Duplicate
• Fix Version/s: 0.10.0
• Component/s: C++
• External issue URL: https://github.com/apache/arrow/issues/18510
• Assignee: Alessandro Andrioni
• Reporter: Krisztian Szucs
• Created: 09/Apr/18 12:23
• Updated: 11/Jan/23 07:20
• Resolved: 08/May/18 17:45

Description

The readme references llvm 4 multiple times however llvm 5 is required.

Issue Links

• duplicates: ARROW-2529 [C++] Update mention of clang-format to 5.0 in the docs