Optimization: on for all except a few.
Optimization: on for all except a few.

Optimization had been switched off for all code except for
one that really needed optimization.

Let's do it the opposite: compile all files with optimization
but excempt a few that take excessively long to compile. This
also makes it very explicit which can benefit the most by
different code generation.

Compilation time roughly doubles on my machine with this change,
but the runtime also is significant: a uhdm-dump is about 3x
faster (On my machine a dump of blackparrot takes 19 seconds vs. 65 seconds).

Given that with ccache we won't really see increased compilation times
after the first compile, this looks like well worth it.

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

chipsalliance/UHDM,chipsalliance/UHDM,chipsalliance/UHDM