use "new" VST search path code and adjust build system to reflect new source files

libs/ardour/plugin_manager.cc

@@ -63,6 +63,7 @@
 #include "ardour/rc_configuration.h"
 
 #include "ardour/ladspa_search_path.h"
+#include "ardour/vst_search_path.h"
 
 #ifdef LV2_SUPPORT
 #include "ardour/lv2_plugin.h"
@@ -83,7 +84,6 @@
 
 #include "pbd/error.h"
 #include "pbd/stl_delete.h"
-#include "pbd/fallback_folders.h"
 
 #include "i18n.h"
 
@@ -153,11 +153,7 @@ PluginManager::PluginManager ()
 	}
 
 	if (windows_vst_path.length() == 0) {
-#ifdef PLATFORM_WINDOWS
-		windows_vst_path = PBD::get_platform_fallback_folder (PBD::FOLDER_VST);
-#else
-		windows_vst_path = "/usr/local/lib/vst:/usr/lib/vst";
-#endif
+		windows_vst_path = vst_search_path ();
 	}
 
 	if ((s = getenv ("LXVST_PATH"))) {

libs/ardour/wscript

@@ -216,6 +216,7 @@ libardour_sources = [
         'user_bundle.cc',
         'utils.cc',
         'version.cc',
+        'vst_search_path.cc',
         'vumeterdsp.cc',
         'worker.cc'
 ]

libs/pbd/wscript

@@ -149,7 +149,7 @@ def build(bld):
     if bld.env['build_target'] == 'x86_64':
         obj.defines += [ 'USE_X86_64_ASM' ]
     if bld.env['build_target'] == 'mingw':
-        obj.source += [ 'fallback_folders.cc' ]
+        obj.source += [ 'windows_special_dirs.cc' ]
         obj.linkflags += ['-lole']
 
     if bld.env['BUILD_TESTS'] and bld.is_defined('HAVE_CPPUNIT'):