upgrade katran's libbpf dependency to 0.3
upgrade katran's libbpf dependency to 0.3

Summary:
This'll move getdeps dependency for katran to 0.3 (which is already the case
for travis build)

Reviewed By: avasylev

Differential Revision: D26129525

fbshipit-source-id: ec9d0615a3e02d75454a3f9dd974ac5c7589e40a

facebook/bistro,facebook/bistro,facebook/bistro,facebook/bistro,facebook/bistro,facebook/bistro