Fix output files of the *_header_check targets

Header files of a Qt module are usually found in subdirectories.
Avoid creating object file paths like "header_foo/bar.h.o".
When building with conan, the "header_foo" subdirectory was not created
for whatever reason.

Now, we make sure we have clean object file paths, e.g.
"header_check/foo/bar.h.o", and we create the directory upfront before
invoking the compiler.

Fixes: QTBUG-90529
Change-Id: Ifa5d6b97e07fc4e249c58cda5128439d60b14f5f
Reviewed-by: Kai Koehne <kai.koehne@qt.io>
(cherry picked from commit 54980200c79b466a276a4d3054390e4b3162e9ed)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

0 files changed, 0 insertions, 0 deletions