Add ability to generate newc additions on runtime.

include/grub/linux.h

@@ -0,0 +1,24 @@
+#include <grub/file.h>
+
+struct grub_linux_initrd_component;
+
+struct grub_linux_initrd_context
+{
+  int nfiles;
+  struct grub_linux_initrd_component *components;
+  grub_size_t size;
+};
+
+grub_err_t
+grub_initrd_init (int argc, char *argv[],
+		  struct grub_linux_initrd_context *ctx);
+
+grub_size_t
+grub_get_initrd_size (struct grub_linux_initrd_context *ctx);
+
+void
+grub_initrd_close (struct grub_linux_initrd_context *initrd_ctx);
+
+grub_err_t
+grub_initrd_load (struct grub_linux_initrd_context *initrd_ctx,
+		  char *argv[], void *target);