Adds a monolithic ebuild for the experimental clang fork by Bloomberg
implementing P2996 (Reflection for C++26).
It is cobbled together — somewhat arbitrarily — from the various split
ebuilds in the main portage tree and builds clang, libc++, and
libc++abi, which are installed into
/usr/lib/{clang,llvm}/bloomberg-p2996.
Two patches address compiler warnings that trigger QA notices. The
remaining QA notices are likely false positives.
Signed-off-by: Florian Albrechtskirchinger <falbrechtskirchinger@gmail.com>
