Merging r366443:

------------------------------------------------------------------------
r366443 | sammccall | 2019-07-18 17:00:38 +0200 (Thu, 18 Jul 2019) | 1 line

[clangd] Disable DumpRecordLayout by default per https://bugs.llvm.org/show_bug.cgi?id=42670
------------------------------------------------------------------------

llvm-svn: 366713