Reduce optimization levels of slow-to-compile files further.
Reduce optimization levels of slow-to-compile files further.

Since the optimization was done always, it also hurt the debug
build. Let's do no optimization on these files until we have figured
out how to make them compile fast.

Signed-off-by: Henner Zeller <259ad50fabbfd39355f36ecd6c0afca541ea66ef@acm.org>

chipsalliance/UHDM,chipsalliance/UHDM,chipsalliance/UHDM