Highlight bpftrace source files
Highlight bpftrace source files

Tell github-linguist to recognize these files as D.  The second line then
tells github-linguist to ignore those files in statistics, to avoid having
this repository recognized as a D repository.

Signed-off-by: Paul Chaignon <8f06420b7cfda2ad8b4ac0cce3b41f5e3a9a88e2@orange.com>

iovisor/bpftrace,iovisor/bpftrace,iovisor/bpftrace,iovisor/bpftrace