Explicitly include sys/types.h
Explicitly include sys/types.h

This will help build bcc on Alpine Linux.

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