Make lguest_launcher.h types userspace-friendly

lguest_launcher.h uses "u32" not "__u32", which sets a bad example.  Fix that,
and include <linux/types.h>.

This means we need to use -I on the Launcher build line so types.h is found.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
diff --git a/Documentation/lguest/Makefile b/Documentation/lguest/Makefile
index c0b7a45..526c15f 100644
--- a/Documentation/lguest/Makefile
+++ b/Documentation/lguest/Makefile
@@ -11,7 +11,7 @@
 include $(KBUILD_OUTPUT)/.config
 LGUEST_GUEST_TOP := ($(CONFIG_PAGE_OFFSET) - 0x08000000)
 
-CFLAGS:=-Wall -Wmissing-declarations -Wmissing-prototypes -O3 -Wl,-T,lguest.lds
+CFLAGS:=-Wall -Wmissing-declarations -Wmissing-prototypes -O3 -I../../include -Wl,-T,lguest.lds
 LDLIBS:=-lz
 # Removing this works for some versions of ld.so (eg. Ubuntu Feisty) and
 # not others (eg. FC7).
diff --git a/Documentation/lguest/lguest.c b/Documentation/lguest/lguest.c
index 276f2f6..fa838e2 100644
--- a/Documentation/lguest/lguest.c
+++ b/Documentation/lguest/lguest.c
@@ -45,8 +45,8 @@
 typedef uint32_t u32;
 typedef uint16_t u16;
 typedef uint8_t u8;
-#include "../../include/linux/lguest_launcher.h"
-#include "../../include/asm-x86/e820.h"
+#include "linux/lguest_launcher.h"
+#include "asm-x86/e820.h"
 /*:*/
 
 #define PAGE_PRESENT 0x7 	/* Present, RW, Execute */