powerpc: Enable execve syscall exit tracepoint

powerpc: Enable execve syscall exit tracepoint

This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven.
This ID is fixed in Linux Kernel version v4.9.321 by commit 9c58e6d866892380dc70aa9a8a7dd2b47da7dce0. For more details please see the references link.