tree dc33113581de0dc190bd65bc722279ec32f7b0ef
parent 8883a739b3a5e61103789a4819228b78f81de73b
author Xin Li <delphij@google.com> 1532993626 -0700
committer Xin Li <delphij@google.com> 1532994166 -0700

Don't build STS when it does not exist.

Change-Id: I7d5f6e11c7369fa473108605183581ad00e83887