docs: references_guide.md: add/fix search examples/tools links (#2186)
docs: references_guide.md: add/fix search examples/tools links (#2186)

add/fix search examples/tools links in references_guide.md
tuxology/bcc,tuxology/bcc,tuxology/bcc,mcaleavya/bcc,brendangregg/bcc,iovisor/bcc,brendangregg/bcc,iovisor/bcc,mcaleavya/bcc,brendangregg/bcc,mcaleavya/bcc,mcaleavya/bcc,brendangregg/bcc,iovisor/bcc,iovisor/bcc,brendangregg/bcc,iovisor/bcc,tuxology/bcc,tuxology/bcc,mcaleavya/bcc