Fix directfb-fusion kernel module build.

This patch avoids the following error occurs:

/usr/bin/make -f scripts/Makefile.build obj=/opt/br/output/build/linux-fusion-8.8.1/linux/drivers/char/fusion /opt/br/output/host/usr/bin/ccache 
  /opt/br/output/host/usr/bin/arm-buildroot-linux-uclibcgnueabi-gcc -Wp,-MD,/opt/br/output/build/linux-fusion-8.8.1/linux/drivers/char/fusion/single/.fusioncore_impl.o.d
  -nostdinc -isystem /opt/br/output/host/usr/lib/gcc/arm-buildroot-linux-uclibcgnueabi/4.6.3/include -I/opt/br/output/build/linux-3.6/arch/arm/include 
  -Iarch/arm/include/generated -Iinclude  -include /opt/br/output/build/linux-3.6/include/linux/kconfig.h -D__KERNEL__ -mlittle-endian -Iarch/arm/mach-versatile/include
  -Iarch/arm/plat-versatile/include -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -I/opt/br/output/build/linux-fusion-8.8.1/linux/include -Wall -Wundef 
  -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -Wno-format-security -fno-delete-null-pointer-checks -O2 -marm 
  -fno-dwarf2-cfi-asm -mabi=aapcs-linux -mno-thumb-interwork -funwind-tables -D__LINUX_ARM_ARCH__=5 -march=armv5te -mtune=arm9tdmi -msoft-float -Uarm -Wframe-larger-than=1024
  -fno-stack-protector -Wno-unused-but-set-variable -fomit-frame-pointer -Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow -fconserve-stack  -DMODULE
  -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(fusioncore_impl)"  -D"KBUILD_MODNAME=KBUILD_STR(fusion)" -c -o 
/opt/br/output/build/linux-fusion-8.8.1/linux/drivers/char/fusion/single/fusioncore_impl.o /opt/br/output/build/linux-fusion-8.8.1/linux/drivers/char/fusion/single/fusioncore_impl.c
/opt/br/output/build/linux-fusion-8.8.1/linux/drivers/char/fusion/single/fusioncore_impl.c:25:19: fatal error: debug.h: No such file or directory
compilation terminated.
make[3]: *** [/opt/br/output/build/linux-fusion-8.8.1/linux/drivers/char/fusion/single/fusioncore_impl.o] Error 1
make[2]: *** [_module_/opt/br/output/build/linux-fusion-8.8.1/linux/drivers/char/fusion] Error 2
make[2]: Leaving directory `/opt/br/output/build/linux-3.6'
make[1]: *** [modules] Error 2
make[1]: Leaving directory `/opt/br/output/build/linux-fusion-8.8.1'


Signed-off-by: Samuel Martin <s.martin49@gmail.com>

diff -purN linux-fusion-8.8.1.orig/linux/drivers/char/fusion/fusioncore.h linux-fusion-8.8.1/linux/drivers/char/fusion/fusioncore.h
--- linux-fusion-8.8.1.orig/linux/drivers/char/fusion/fusioncore.h	2012-10-15 21:47:53.881834496 +0200
+++ linux-fusion-8.8.1/linux/drivers/char/fusion/fusioncore.h	2012-10-15 22:05:27.232401023 +0200
@@ -17,7 +17,7 @@
 
 #include <linux/stddef.h>
 
-#include "fusioncore_impl.h"
+#include "single/fusioncore_impl.h"
 
 typedef enum {
      FC_OK,
diff -purN linux-fusion-8.8.1.orig/linux/drivers/char/fusion/single/fusioncore_impl.c linux-fusion-8.8.1/linux/drivers/char/fusion/single/fusioncore_impl.c
--- linux-fusion-8.8.1.orig/linux/drivers/char/fusion/single/fusioncore_impl.c	2012-10-15 21:47:53.878501243 +0200
+++ linux-fusion-8.8.1/linux/drivers/char/fusion/single/fusioncore_impl.c	2012-10-15 22:05:38.585511304 +0200
@@ -22,9 +22,9 @@
 #include <linux/slab.h>
 #include <linux/sched.h>
 
-#include "debug.h"
+#include "../debug.h"
 
-#include "fusioncore.h"
+#include "../fusioncore.h"