execsnoop stops working after resume from suspend (sleep)

`execsnoop` stops working after resume from suspend (sleep), that is, start `execsnoop`, then suspend system and resume, and `execsnoop` doesn't capture some newly started processes.

My OS is Archlinux.

**Steps to Reproduce:**
1. Install `bcc-git` `bcc-tools-git` `python-bcc-git` from AUR.
2. Run `sudo bcc execsnoop`. Here it successfully capture all started processes.
3. Don't kill the `execsnoop` process. Suspend system, and then resume.
4. Run some new programs, and check whether the previous `execsnoop` process can still captures it. Here `execsnoop` can't capture some newly started processes.

Start with the `execsnoop` entry point and reproduce the report using `sudo bcc execsnoop` on Arch Linux. Suspend and resume the system, then launch new programs; done means `execsnoop` continues capturing all newly started processes after resume.

Written by the indexing model from the issue text.