Implement the CLAP log extension

src/plugin/bridges/clap-impls/plugin-proxy.h

@@ -23,6 +23,7 @@
 #include <clap/ext/audio-ports.h>
 #include <clap/ext/gui.h>
 #include <clap/ext/latency.h>
+#include <clap/ext/log.h>
 #include <clap/ext/note-ports.h>
 #include <clap/ext/params.h>
 #include <clap/ext/state.h>
@@ -65,6 +66,7 @@ struct ClapHostExtensions {
     const clap_host_audio_ports_t* audio_ports = nullptr;
     const clap_host_gui_t* gui = nullptr;
     const clap_host_latency_t* latency = nullptr;
+    const clap_host_log_t* log = nullptr;
     const clap_host_note_ports_t* note_ports = nullptr;
     const clap_host_params_t* params = nullptr;
     const clap_host_state_t* state = nullptr;