We should build stdlib with installed sac2c

There have been some issues when compiling the stdlib outside of the masterrun. Typically headers give off warnings and errors. This is caused by config.h not being included in as part of the install target.

We have two choices:

• we include config.h as part of the install target - NTL lib for instance does this
• we extend the masterrun to install sac2c, and then compile sac2c.

Though we can include config.h, its functions is for when we build the runtime-libraries and often is system specific. Including it in the install target means it also get packages... I'm not sure if this might lead to conflict due to differing system configurations.

Updating the masterrun is fairly straightforward... we can do this first I think.