Include DeterministicSchedule.h in exported headers by folly-oss

Summary: Needed if a downstream project needs to compile against Deterministic schedule; which is now a part of the folly_test_util library.

Reviewed By: Orvid

Differential Revision: D14597430

fbshipit-source-id: 84f590640a32cb71d8c9422ff5a32ba5e71585e6

CMakeLists.txt

@@ -159,6 +159,8 @@ list(APPEND hfiles
   ${FOLLY_DIR}/io/async/test/TimeUtil.h
   ${FOLLY_DIR}/io/async/test/UndelayedDestruction.h
   ${FOLLY_DIR}/io/async/test/Util.h
+  ${FOLLY_DIR}/test/DeterministicSchedule.h
+  ${FOLLY_DIR}/test/JsonTestUtil.h
   ${FOLLY_DIR}/test/TestUtils.h
 )