[c++11]: c++11 as default and Makefile refactoring
[c++11]: c++11 as default and Makefile refactoring

Some flags were broken because they use c++11 constructions. I put
the flag -std=c++11 in all Makefile.archc. I also refactored the
Makefile.archc to better organize the lib options.

tiagofalcao/ArchC,tiagofalcao/ArchC,tiagofalcao/ArchC,tiagofalcao/ArchC,lianaduenha/ArchC,lianaduenha/ArchC,lianaduenha/ArchC,tiagofalcao/ArchC,tiagofalcao/ArchC,tiagofalcao/ArchC,lianaduenha/ArchC