fix: missing evaluate with '-include'

fix: missing evaluate with '-include'

Symbols declared or defined in files directly or indirectly
given in the command line and thus processed via sparse()
are always automatically evaluated.
Symbols processed via sparse_initialize(), thus the predefined
ones, are not systematically evaluated, which is normaly fine
as they are just declarations and will be evaluated when needed.

However, if the command line include a file via '-include <file>',
the symbols of this file will also not be evaluated, which is still
fine as long as it's only definitions. But, in the rare and odd cases
where the file should contains a function definition, this function
will not be evaluated and it's expansion and linearization won't happen
as it should have.

Fix this by evaluating the symbols issued from sparse_intialize()
like it is done for sparse().

Reported-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Signed-off-by: Christopher Li <sparse@chrisli.org>