stage2: don't pass -l arguments when building .a or .o files

See #7094

src/link/Elf.zig

@@ -1551,6 +1551,7 @@ fn linkWithLLD(self: *Elf, comp: *Compilation) !void {
     }
 
     // Shared libraries.
+    if (is_exe_or_dyn_lib) {
         const system_libs = self.base.options.system_libs.items();
         try argv.ensureCapacity(argv.items.len + system_libs.len);
         for (system_libs) |entry| {
@@ -1562,6 +1563,7 @@ fn linkWithLLD(self: *Elf, comp: *Compilation) !void {
             const arg = if (ext == .shared_library) link_lib else try std.fmt.allocPrint(arena, "-l{}", .{link_lib});
             argv.appendAssumeCapacity(arg);
         }
+    }
 
     if (!is_obj) {
         // libc++ dep