Make bcc_elf_symbol_str support debuginfo
Make bcc_elf_symbol_str support debuginfo

iovisor/bcc,tuxology/bcc,tuxology/bcc,brendangregg/bcc,brendangregg/bcc,tuxology/bcc,brendangregg/bcc,brendangregg/bcc,iovisor/bcc,tuxology/bcc,brendangregg/bcc,iovisor/bcc,tuxology/bcc,iovisor/bcc,iovisor/bcc