tests: Add the 'vega_x86_tag' to testlib

This allows us to test ./build/VEGA_X86/gem5.opt targets.

Change-Id: I4d8309f928317d03b63e07e5ebb43de68cded9f2
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/59010
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Matthew Poremba <matthew.poremba@amd.com>
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
1 file changed