Force -znobtcfi on linker invocation.

Index: src/link/Lld.zig
--- src/link/Lld.zig.orig
+++ src/link/Lld.zig
@@ -876,6 +876,9 @@ fn elfLink(lld: *Lld, arena: Allocator) !void {
 
         try argv.append("--error-limit=0");
 
+        try argv.append("-z");
+        try argv.append("nobtcfi");
+
         if (comp.sysroot) |sysroot| {
             try argv.append(try std.fmt.allocPrint(arena, "--sysroot={s}", .{sysroot}));
         }
