self-hosted x86 backend has formatted panics disabled

[andrewrk]

zig/src/target.zig

Lines 589 to 596 in 085cc54

	.panic_unwrap_error => switch (backend) {
	.stage2_c, .stage2_llvm => true,
	else => false,
	},
	.safety_check_formatted => switch (backend) {
	.stage2_c, .stage2_llvm => true,
	else => false,
	},

After #21520, this causes:

+ ./zig2 build -Dno-lib
install
+- install zig
   +- zig build-exe zig Debug native 705 errors
error: fatal linker error: cannot expand segment seg(0)(__TEXT_ZIG) in virtual memory
    note: TODO: emit relocations to memory locations in self-hosted backends
    note: as a workaround, try increasing pre-allocated virtual memory of each segment

[jacobly0]

I wasn't following frontend changes enough since this issue was opened to know what it is even supposed to be tracking now.

[andrewrk]

Closed by 4f8d244