Fixed lldb_test on MacOS

tests/lldb_test.cpp

@@ -2,9 +2,13 @@
 #include <atomic>
 #include <boost/filesystem.hpp>
 #include <glib.h>
+#include <gtksourceviewmm.h>
 #include <thread>
 
 int main() {
+  auto app = Gtk::Application::create();
+  Gsv::init();
+
   auto build_path = boost::filesystem::canonical(JUCI_BUILD_PATH);
   auto exec_path = build_path / "tests" / "lldb_test_files" / "lldb_test_executable";
   g_assert(boost::filesystem::exists(exec_path));