Change functionm "procura_simb" to return end symbol

Signed-off-by: Gustavo Toshi Komura <gtk10@c3sl.ufpr.br>
Put end symbol in code MEPA in the part syntatic

Signed-off-by: Gustavo Toshi Komura <gtk10@c3sl.ufpr.br>
Execute make

Signed-off-by: Gustavo Toshi Komura <gtk10@c3sl.ufpr.br>