Merge commit 989879f8fded from llvm git (by Paul Walker):
[Clang] Allow C++11 style initialisation of SVE types. Fixes https://github.com/llvm/llvm-project/issues/63223 Differential Revision: https://reviews.llvm.org/D153560
Requested by: andrew
MFC after: 3 days
(cherry picked from commit 641efdd10cc3ad05fb7eaeeae20b15c5ad4128c8)