enable source highlighting of C++ and makefile
enable source highlighting of C++ and makefile

Change-Id: Ib8ded11bbc38d496aefdf3862c7eb9aece4299ed

chenm001/connectal,csail-csg/connectal,csail-csg/connectal,chenm001/connectal,chenm001/connectal,cambridgehackers/connectal,8l/connectal,cambridgehackers/connectal,hanw/connectal,csail-csg/connectal,chenm001/connectal,hanw/connectal,hanw/connectal,8l/connectal,csail-csg/connectal,csail-csg/connectal,cambridgehackers/connectal,cambridgehackers/connectal,cambridgehackers/connectal,hanw/connectal,8l/connectal,chenm001/connectal,8l/connectal,8l/connectal,hanw/connectal