When producing zig2.c, don't waste time emitting C code for subcommands
that won't be used, such as objcopy.
This takes zig2.c down from 111M to 109M, and sidesteps some unfortunate
warnings that are currently emitted by GCC.
fea6157102Andrew Kelley committed on 5/17/2023, 10:43:15 PMparentad20236