util: ext/systemc is importing env Environment instead of main

This got changed by [1]
With this patch we export env instead of main. There is no risk of
ext/systemc polluting the environment as its SConscript is cloning env
to the systemc variable anyway, so this double copy was redundant anyway

[1]: https://gem5-review.googlesource.com/c/public/gem5/+/56750

Change-Id: Ib6648e9b38416cac0bc7f06d90a337f32bdca6ca
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/66854
Maintainer: Daniel Carvalho <odanrc@yahoo.com.br>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
1 file changed