update buildroot to 2017.02.11

bsp/buildroot-2017.02.11/fs/initramfs/Config.in

@@ -0,0 +1,21 @@
+config BR2_TARGET_ROOTFS_INITRAMFS
+	bool "initial RAM filesystem linked into linux kernel"
+	depends on BR2_LINUX_KERNEL
+	select BR2_TARGET_ROOTFS_CPIO
+	help
+	  Integrate the root filesystem generated by Buildroot as an
+	  initramfs inside the kernel image. This integration will
+	  take place automatically.
+
+	  A rootfs.cpio file will be generated in the images/ directory.
+	  This is the archive that will be included in the kernel image.
+	  The default rootfs compression set in the kernel configuration
+	  is used, regardless of how buildroot's cpio archive is configured.
+
+	  Note that enabling initramfs together with another filesystem
+	  formats doesn't make sense: you would end up having two
+	  identical root filesystems, one embedded inside the kernel
+	  image, and one separately.
+
+comment "initramfs needs a Linux kernel to be built"
+	depends on !BR2_LINUX_KERNEL

bsp/buildroot-2017.02.11/fs/initramfs/initramfs.mk

@@ -0,0 +1,24 @@
+################################################################################
+#
+# Build a kernel with an integrated initial ramdisk
+# filesystem based on cpio.
+#
+################################################################################
+
+ROOTFS_INITRAMFS_DEPENDENCIES += rootfs-cpio
+
+ROOTFS_INITRAMFS_POST_TARGETS += linux-rebuild-with-initramfs
+
+
+# The generic fs infrastructure isn't very useful here.
+
+rootfs-initramfs: $(ROOTFS_INITRAMFS_DEPENDENCIES) $(ROOTFS_INITRAMFS_POST_TARGETS)
+
+rootfs-initramfs-show-depends:
+	@echo $(ROOTFS_INITRAMFS_DEPENDENCIES)
+
+.PHONY: rootfs-initramfs rootfs-initramfs-show-depends
+
+ifeq ($(BR2_TARGET_ROOTFS_INITRAMFS),y)
+TARGETS_ROOTFS += rootfs-initramfs
+endif