added u64 testcase
added u64 testcase

zaafar/bcc,shodoco/bcc,romain-intel/bcc,zaafar/bcc,shodoco/bcc,mkacik/bcc,iovisor/bcc,brendangregg/bcc,mcaleavya/bcc,romain-intel/bcc,mkacik/bcc,tuxology/bcc,iovisor/bcc,iovisor/bcc,brendangregg/bcc,tuxology/bcc,zaafar/bcc,brendangregg/bcc,shodoco/bcc,romain-intel/bcc,romain-intel/bcc,shodoco/bcc,tuxology/bcc,brendangregg/bcc,zaafar/bcc,mcaleavya/bcc,zaafar/bcc,brendangregg/bcc,tuxology/bcc,romain-intel/bcc,mkacik/bcc,mkacik/bcc,tuxology/bcc,mkacik/bcc,iovisor/bcc,iovisor/bcc,mcaleavya/bcc,mcaleavya/bcc,shodoco/bcc,mcaleavya/bcc