[PRQ#51510] Merge Request for rtags-clang-git

MarsSeed [1] filed a request to merge rtags-clang-git [2] into rtags [3]: 'rtags-clang-git' is a duplicate of 'rtags', i.e., not a VCS package, and both are built with clang. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/rtags-clang-git/ [3] https://aur.archlinux.org/pkgbase/rtags/