Summary:Split up

  io/test/IOBufCursorTest
  test/BitsTest
  test/CacheLocalityTest
  test/CallOnceTest
  test/ConvTest
  test/LoggingTest
  test/MemoryIdlerTest
  test/RandomTest
  test/ThreadLocalTest

Reviewed By: yfeldblum

Differential Revision: D2973132

fb-gh-sync-id: 9dadbdf49a31e82c3a2e34c2fdb6a2b47aa0928d
shipit-source-id: 9dadbdf49a31e82c3a2e34c2fdb6a2b47aa0928d