Initial ramdisk support

- Create initrd library to support definitions and loading
- Allow tools compiled for the host machine to be built by wscript
- Create makerd tool to build initrd from manifest
- Move screenfont to initrd, so don't load framebuffer initially

src/boot/memory.c

@@ -188,7 +188,7 @@ memory_virtualize(EFI_RUNTIME_SERVICES *runsvc, struct memory_map *map)
 	while (d < end) {
 		switch (d->Type) {
 		case KERNEL_MEMTYPE:
-		case KERNEL_FONT_MEMTYPE:
+		case INITRD_MEMTYPE:
 		case KERNEL_DATA_MEMTYPE:
 			d->Attribute |= EFI_MEMORY_RUNTIME;
 			d->VirtualStart = d->PhysicalStart + KERNEL_VIRT_ADDRESS;