Need to export to be able to use it in commonds.do.

tools/modelsim/set_modelsim

@@ -29,7 +29,7 @@
 # - use '. <script>.sh' to have the settings apply in this shell, otherwise they get lost when <script>.sh returns
 
 # Select target
-TOOLSET=${1:-}
+export TOOLSET=${1:-}
 echo "Make Modelsim and Altera library simulation settings for RadioHDL with tool setting: ${TOOLSET}"
 
 # Select tool version