UI: Skip ChromeOS test on FreeBSD

As with Windows and macOS there's no need to check for ChromeOS on
FreeBSD.

UI/obs-app.cpp

@@ -1981,7 +1981,7 @@ static int run_program(fstream &logFile, int argc, char *argv[])
 	run:
 #endif
 
-#if !defined(_WIN32) && !defined(__APPLE__)
+#if !defined(_WIN32) && !defined(__APPLE__) && !defined(__FreeBSD__)
 		// Mounted by termina during chromeOS linux container startup
 		// https://chromium.googlesource.com/chromiumos/overlays/board-overlays/+/master/project-termina/chromeos-base/termina-lxd-scripts/files/lxd_setup.sh
 		os_dir_t *crosDir = os_opendir("/opt/google/cros-containers");