scons: fix hook for 'deprecated' attribute

On the new release, the compilation is polluted by the same warning:
    > ''deprecated' attribute directive ignored

It seems that the hook added in this patch does not work:
https://gem5-review.googlesource.com/c/public/gem5/+/45246/1..7

The snippet of code compile with TryCompile on g++{8,9}.
It probably comes from the fact that the compilation
only creates a warning and not an error.

By adding temporarily '-Werror' for this compilation test,
it filters the faulty gcc versions.

Change-Id: I2b8b7a1a7e06df437b76e98d212947f4f9452311
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/48843
Reviewed-by: Gabe Black <gabe.black@gmail.com>
Maintainer: Gabe Black <gabe.black@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
(cherry picked from commit a366e66272b7c4b01037d68a7723922b49f506cd)
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/50028
Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
1 file changed