zig cc: handle the -r flag

This makes -r treated the same as -c which is to output an object file.
Zig's ELF linker code already handles multiple object files into an
object file with the -r flag to LLD.

closes #11683
c22a30ac99Andrew Kelley committed on 4/8/2023, 7:48:27 PMparentaa45854
3 files changedLine totals unavailable