Add a IsInstrumentationRuntimePresent SB API

Reviewed at http://reviews.llvm.org/D5738

This adds an SB API into SBProcess:
  bool SBProcess::IsInstrumentationRuntimePresent(InstrumentationRuntimeType type);
which simply tells whether a particular InstrumentationRuntime (read "ASan") plugin is present and active.




git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@219560 91177308-0d34-0410-b5e6-96231b3b80d8