Merge "vulkan: fix double dlopen for layer libraries" into nyc-dev am: 79994146e1 am: 0e92ae1333
am: 761f286c79

* commit '761f286c79439623d628561706582191c232f056':
  vulkan: fix double dlopen for layer libraries

Change-Id: I3fc04fd338c3ea51ee2bbec0e494835f2a127f98