[lldb/Plugin] s/LLDB_PLUGIN/LLDB_PLUGIN_DEFINE/ (NFC)

Rename LLDB_PLUGIN to LLDB_PLUGIN_DEFINE as Pavel suggested in D73067 to
avoid name conflict.

lldb/source/Plugins/ObjectFile/Breakpad/ObjectFileBreakpad.cpp

@@ -16,7 +16,7 @@ using namespace lldb;
 using namespace lldb_private;
 using namespace lldb_private::breakpad;
 
-LLDB_PLUGIN(ObjectFileBreakpad)
+LLDB_PLUGIN_DEFINE(ObjectFileBreakpad)
 
 namespace {
 struct Header {