現在、RZ/G1CーPF評価ボードでYoctoの構築を行っているのですが、
bitbake core-image-westonコマンドを実行すると下記のエラーが発生し、
解消がなかなか難しい状態です。
問題点や解消方法をご存じの方がおられましたらお力添えいただけますと幸いです。

VirtualBox:~/iwg23s-release-bsp/build$ bitbake core-image-weston
Loading cache: 100% |########################################################################################| ETA: 00:00:00
Loaded 1801 entries from dependency cache.
NOTE: Resolving any missing task queue dependencies
NOTE: multiple providers are available for jpeg (jpeg, libjpeg-turbo)
NOTE: consider defining a PREFERRED_PROVIDER entry to match jpeg
NOTE: multiple providers are available for virtual/mesa (mesa, mesa-gl)
NOTE: consider defining a PREFERRED_PROVIDER entry to match virtual/mesa
NOTE: multiple providers are available for virtual/libgl (mesa, mesa-gl)
NOTE: consider defining a PREFERRED_PROVIDER entry to match virtual/libgl
NOTE: multiple providers are available for runtime libgl (mesa, mesa-gl)
NOTE: consider defining a PREFERRED_PROVIDER entry to match libgl
NOTE: multiple providers are available for jpeg-native (jpeg-native, libjpeg-turbo-native)
NOTE: consider defining a PREFERRED_PROVIDER entry to match jpeg-native

Build Configuration:
BB_VERSION = "1.22.0"
BUILD_SYS = "x86_64-linux"
NATIVELSBSTRING = "Ubuntu-14.04"
TARGET_SYS = "arm-poky-linux-gnueabi"
MACHINE = "iwg23s"
DISTRO = "poky"
DISTRO_VERSION = "1.6.1"
TUNE_FEATURES = "armv7a vfp neon callconvention-hard cortexa7"
TARGET_FPU = "vfp-neon"
meta
meta-yocto
meta-yocto-bsp = "tmp:c4f1f0f491f988901bfd6965f7d10f60cb94a76f"
meta-rzg1
meta-renesas = "<unknown>:<unknown>"
meta-oe = "tmp:dca466c074c9a35bc0133e7e0d65cca0731e2acf"
meta-linaro-toolchain = "tmp:8a0601723c06fdb75e62aa0f0cf15fc9d7d90167"

NOTE: Preparing runqueue
NOTE: Executing SetScene Tasks
NOTE: Executing RunQueue Tasks
ERROR: Command Error: exit status: 1 Output:
error: patch failed: arch/arm/boot/dts/Makefile:180
error: arch/arm/boot/dts/Makefile: patch does not apply
error: arch/arm/boot/dts/r8a77470.dtsi: already exists in working directory
error: arch/arm/boot/dts/r8a77470-skrzg1c.dts: already exists in working directory
error: arch/arm/boot/dts/r8a77471.dtsi: already exists in working directory
error: arch/arm/boot/dts/r8a77471-skrzg1c.dts: already exists in working directory
error: patch failed: arch/arm/configs/shmobile_defconfig:20
error: arch/arm/configs/shmobile_defconfig: patch does not apply
error: patch failed: arch/arm/mach-shmobile/Kconfig:56
error: arch/arm/mach-shmobile/Kconfig: patch does not apply
error: patch failed: arch/arm/mach-shmobile/Makefile:20
error: arch/arm/mach-shmobile/Makefile: patch does not apply
error: patch failed: arch/arm/mach-shmobile/Makefile.boot:17
error: arch/arm/mach-shmobile/Makefile.boot: patch does not apply
error: arch/arm/mach-shmobile/pm-r8a7747x.c: already exists in working directory
error: arch/arm/mach-shmobile/r8a7747x.h: already exists in working directory
error: arch/arm/mach-shmobile/setup-r8a7747x.c: already exists in working directory
error: arch/arm/mach-shmobile/smp-r8a7747x.c: already exists in working directory
error: arch/arm/mach-shmobile/board-skrzg1c-reference.c: already exists in working directory
error: include/dt-bindings/clock/r8a7747x-clock.h: already exists in working directory
ERROR: Function failed: patch_do_patch
ERROR: Logfile of failure stored in: /home/protec/iwg23s-release-bsp/build/tmp/work/iwg23s-poky-linux-gnueabi/linux-iwg23s/3.10+git9c8ffcd274f74c4c4efecb307157ee4c6df54fa4-r0/temp/log.do_patch.10477
ERROR: Task 67 (/home/protec/iwg23s-release-bsp/build/../meta-renesas/meta-rzg1/recipes-kernel/linux/linux-iwg23s_3.10.bb, do_patch) failed with exit code '1'
NOTE: Tasks Summary: Attempted 736 tasks of which 735 didn't need to be rerun and 1 failed.
No currently running tasks (735 of 4433)

Summary: 1 task failed:
/home/protec/iwg23s-release-bsp/build/../meta-renesas/meta-rzg1/recipes-kernel/linux/linux-iwg23s_3.10.bb, do_patch
Summary: There were 2 ERROR messages shown, returning a non-zero exit code.