Configure: let platform->dsoext() default with platform->shlibextsimple()
We still use '.so' as a last resort...
Fixes
@@ -13,7 +13,8 @@ require platform::BASE;
use configdata;
sub binext { $target{exe_extension} || '' }
-sub dsoext { $target{dso_extension} || '.so' }
+sub dsoext { $target{dso_extension} || platform->shlibextsimple()
+ || '.so' }
# Because these are also used in scripts and not just Makefile, we must
# convert $(SHLIB_VERSION_NUMBER) to the actual number.
sub shlibext { (my $x = $target{shared_extension}
