[lldb] Fix a warning

This patch fixes:

  lldb/source/Target/ProcessTrace.cpp:23:33: error: extra ';' outside
  of a function is incompatible with C++98
  [-Werror,-Wc++98-compat-extra-semi]

Author: kazutakahirata

lldb/source/Target/ProcessTrace.cpp

@@ -20,7 +20,7 @@
 using namespace lldb;
 using namespace lldb_private;
 
-LLDB_PLUGIN_DEFINE(ProcessTrace);
+LLDB_PLUGIN_DEFINE(ProcessTrace)
 
 llvm::StringRef ProcessTrace::GetPluginDescriptionStatic() {
   return "Trace process plug-in.";