coff: commit missing Object.zig placeholder

src/link/Coff/Object.zig

@@ -0,0 +1,12 @@
+const Object = @This();
+
+const std = @import("std");
+const mem = std.mem;
+
+const Allocator = mem.Allocator;
+
+name: []const u8,
+
+pub fn deinit(self: *Object, gpa: Allocator) void {
+    gpa.free(self.name);
+}