Makefile: add internal/trace to noinst_DATA
    
    The internal/trace package is only imported by tests (specifically the
    tests in runtime/trace) so it must be in noinst_DATA to ensure that it
    is built before running the tests.
    
    This was mostly working because internal/trace has tests itself, and
    is listed in check-packages.txt before runtime/trace, so typical
    invocations of make would build internal/trace for checking purposes
    before checking runtime/trace.  But we need this change to make that
    reliable.
    
    Reviewed-on: https://go-review.googlesource.com/99836

From-SVN: r258392