fix libsodium build
fix libsodium build

Summary: modifying some builds.

Reviewed By: plapukhov, eduardo-elizondo

Differential Revision: D5898592

fbshipit-source-id: cb9bbac598a5ccab283f2c18f29a1065592de3eb

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