Remove debug prints and re-enable all test cases in test_file_input_stream.cpp

@mortenvp @jpihl I found a solution for this OpenWrt problem: adding ``conf.env['STLIB'] += ['gcc_eh']`` to the mkspec produces a binary which has all the C++ libraries statically linked. Now the exceptions work on both the VM and the Laguna board.
So I removed the debug prints, and I merge this branch to run a dependency check with the new mkspecs.