Fix dlsym() to take into account RTLD_GLOBAL/LOCAL

  Symbols from libraries opened with RTLD_LOCAL (default)
  should not be visible via dlsym(RLTD_DEFAULT/RTLD_NEXT, .)

Bug: 17512583
Change-Id: I1758943081a67cf3d49ba5808e061b8251a91964
5 files changed