mips: Add the AT_RANDOM aux vector to the initial stack.
mips: Add the AT_RANDOM aux vector to the initial stack.

This is blindly used by at least modern glibc-s

Change-Id: I8fb904d487d0cb5f7747d063a6ed84894ee6b905
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/26828
Reviewed-by: Gabe Black <5c8aa1266c03186393d9e7b3b4e3b14239af8201@google.com>
Maintainer: Gabe Black <5c8aa1266c03186393d9e7b3b4e3b14239af8201@google.com>
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>

gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5