Add simple stacktrace logging

test/mock/kernel/panic_mock.zig

@@ -1,7 +1,13 @@
 const builtin = @import("builtin");
 const std = @import("std");
+const MemProfile = @import("mem_mock.zig").MemProfile;
 
 pub fn panic(trace: ?*builtin.StackTrace, comptime format: []const u8, args: ...) noreturn {
     @setCold(true);
     std.debug.panic(format, args);
 }
+
+pub fn init(mem_profile: *const MemProfile, allocator: *std.mem.Allocator) !void {
+    // This is never run so just return an arbitrary error to satisfy the compiler
+    return error.NotNeeded;
+}