Minor documentation fix for ThriftHandler
Minor documentation fix for ThriftHandler

Summary: Updated function documentation

Test Plan: No real changes

Reviewed By: petr@fb.com

FB internal diff: D1963790

Signature: t1:1963790:1428165384:a54514371548da4e8aaa84bd8c6d343bf571bef7

Signed-off-by: Ori Bernstein <f1fed15cf5b8387c8aee8bc535d6c2b48da91000@fb.com>

peterlei/fboss,sonoble/fboss,raphaelamorim/fboss,biddyweb/fboss,raphaelamorim/fboss,neuhausler/fboss,biddyweb/fboss,sonoble/fboss,peterlei/fboss,peterlei/fboss,peterlei/fboss,sonoble/fboss,neuhausler/fboss,biddyweb/fboss,raphaelamorim/fboss,neuhausler/fboss,neuhausler/fboss