Convert Platform, Process, and Connection functions to StringRef.

All tests pass on Linux and Windows.

llvm-svn: 287259
diff --git a/lldb/source/Target/Target.cpp b/lldb/source/Target/Target.cpp
index fb43c40..e517d6c 100644
--- a/lldb/source/Target/Target.cpp
+++ b/lldb/source/Target/Target.cpp
@@ -170,7 +170,7 @@
 }
 
 const lldb::ProcessSP &Target::CreateProcess(ListenerSP listener_sp,
-                                             const char *plugin_name,
+                                             llvm::StringRef plugin_name,
                                              const FileSpec *crash_file) {
   DeleteCurrentProcess();
   m_process_sp = Process::FindPlugin(shared_from_this(), plugin_name,