Oops, StringImpl's "the empty string" global was not always initialized.

These "oops forgot to initialize" bugs are getting annoying...

Kernel/init.cpp

@@ -27,7 +27,7 @@
 #include "Console.h"
 
 #define TEST_VFS
-//#define TEST_ELF_LOADER
+#define TEST_ELF_LOADER
 //#define TEST_CRASHY_USER_PROCESSES
 
 static void motd_main() NORETURN;
@@ -102,8 +102,6 @@ static void init_stage2()
     // Anything that registers interrupts goes *after* PIC and IDT for obvious reasons.
     Syscall::initialize();
 
-    VirtualFileSystem::initializeGlobals();
-
     extern void panel_main();
 
     new Task(panel_main, "panel", IPC::Handle::PanelTask, Task::Ring0);
@@ -203,6 +201,9 @@ void init()
 
     MemoryManager::initialize();
 
+    VirtualFileSystem::initializeGlobals();
+    StringImpl::initializeGlobals();
+
     auto keyboard = make<Keyboard>();
 
     PIT::initialize();