fixed a few formatting and string bugs, kprintf() working when called during bootstrapping!

git-svn-id: svn://anubis/hos/trunk@47 5b3e749e-e535-0410-8002-a9bb6afbdfca

kernel/boot/k_bootstrap.cc

@@ -48,6 +48,7 @@ u32_t k_bootstrap(mb_info_t * mb_info, u32_t mb_magic)
     mm_bootstrap();
     kio_bootstrap();
 
+    kprintf("Hello from kprintf()! %d, %x, %u, %l\n", 42, 0xabcd0123, 0xFFFFFFFF, -1234567891234ll);
     return 0;
 }