* grub-core/kern/emu/hostdisk.c: Disentagle into a series of OS-specific

files rather than one file with loads of #if's.
	* util/getroot.c: Likewise.

grub-core/kern/emu/hostdisk_os.c

@@ -0,0 +1,20 @@
+#ifdef __linux__
+#include "hostdisk_linux.c"
+#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
+#include "hostdisk_freebsd.c"
+#elif defined(__NetBSD__) || defined(__OpenBSD__)
+#include "hostdisk_bsd.c"
+#elif defined(__APPLE__)
+#include "hostdisk_apple.c"
+#elif defined(__sun__)
+#include "hostdisk_sun.c"
+#elif defined(__GNU__)
+#include "hostdisk_hurd.c"
+#elif defined(__CYGWIN__)
+#include "hostdisk_cygwin.c"
+#elif defined(__MINGW32__)
+#include "hostdisk_mingw.c"
+#else
+# warning "No hostdisk OS-specific functions is available for your system. Device detection may not work properly."
+#include "hostdisk_basic.c"
+#endif