* config/win/clang.mk
+ add resource compiler detection chain to first stage,
now harbour.exe binary should also have manifest resource
compiled in when clang is used. Previously second stage rc
calling was implemented only in hbmk2.
* utils/hbmk2/hbmk2.prg
! fixed disappearing llvm-ar with fallback to ar, spotted
in windows-ci/MSYS2