Clang: Use -imsvc flag without space to support Clang tools
Since !5231 (merged) we use the -imsvc
flag followed by the include directory as a separate argument. Some
versions of clang-tidy
do not support the flag unless the include
directory is attached to it, so use that form instead.
A similar fix was made by commit !6855 (merged).
Fixes: #23517 (closed)
Backport: release:HEAD^2
Edited by Brad King