qemu/arm-vexpress: update to the latest versions

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

board/qemu/arm-vexpress/readme.txt

@@ -5,4 +5,4 @@ Run the emulation with:
 The login prompt will appear in the terminal that started Qemu. The
 graphical window is the framebuffer.
 
-Tested with QEMU 2.1.0
+Tested with QEMU 2.1.2

configs/qemu_arm_vexpress_defconfig

@@ -13,14 +13,14 @@ BR2_TARGET_GENERIC_GETTY_PORT="ttyAMA0"
 BR2_TARGET_ROOTFS_EXT2=y
 # BR2_TARGET_ROOTFS_TAR is not set
 
-# Lock to 3.16 headers to avoid breaking with newer kernels
+# Lock to 3.17 headers to avoid breaking with newer kernels
 BR2_KERNEL_HEADERS_VERSION=y
-BR2_DEFAULT_KERNEL_VERSION="3.16.3"
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_3_16=y
+BR2_DEFAULT_KERNEL_VERSION="3.17"
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_3_17=y
 
 # Kernel
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="3.16.3"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="3.17"
 BR2_LINUX_KERNEL_DEFCONFIG="vexpress"
 BR2_LINUX_KERNEL_ZIMAGE=y