[clang] [clang-scan-deps] Infer the target from the executable name (PR #108189)

[Chuanqi Xu via cfe-commits]

https://github.com/ChuanqiXu9 commented:

LGTM but I'll leave this to @jansvoboda11 and @Bigcheese 

https://github.com/llvm/llvm-project/pull/108189