Fix build (remove bin/resources link, use signal on unix, not linux)

bin/resources

@@ -1 +0,0 @@
-../source/native-plugins/resources

source/bridges-plugin/CarlaBridgePlugin.cpp

@@ -84,7 +84,7 @@ static bool gIsInitiated = false;
 static volatile bool gCloseNow = false;
 static volatile bool gSaveNow  = false;
 
-#if defined(CARLA_OS_LINUX)
+#if defined(CARLA_OS_UNIX)
 static void closeSignalHandler(int) noexcept
 {
     gCloseNow = true;

source/frontend/Makefile

@@ -257,6 +257,7 @@ resources_rc.py: $(RESDIR)/resources.qrc $(RESDIR)/*/*.png $(RESDIR)/*/*.svg $(R
 	$(PYRCC) $< -o $@
 
 $(BINDIR)/resources/%: %
+	-@mkdir -p $(BINDIR)/resources
 	$(LINK) $(CURDIR)/$* $(BINDIR)/resources/
 
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