create rootf's & SDK from 2018.02.9 buildroot (#10)

---------

Co-authored-by: tiopex <tiopxyz@gmail.com>
Co-authored-by: tiopex <67048640+tiopex@users.noreply.github.com>

configs/nanopi_m1_defconfig

@@ -0,0 +1,44 @@
+# Architecture
+BR2_arm=y
+BR2_cortex_a7=y
+BR2_ARM_FPU_VFPV4=y
+
+# Linux headers same as kernel, a 4.11 series
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_11=y
+
+# System configuration
+BR2_TARGET_GENERIC_HOSTNAME="nanopi-m1"
+BR2_TARGET_GENERIC_ISSUE="Welcome to Buildroot for the NanoPi M1"
+
+# Bootloaders
+BR2_TARGET_UBOOT=y
+BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG=y
+BR2_TARGET_UBOOT_CUSTOM_VERSION=y
+BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2017.07"
+BR2_TARGET_UBOOT_BOARD_DEFCONFIG="nanopi_m1"
+BR2_TARGET_UBOOT_NEEDS_DTC=y
+BR2_TARGET_UBOOT_NEEDS_PYLIBFDT=y
+BR2_TARGET_UBOOT_FORMAT_CUSTOM=y
+BR2_TARGET_UBOOT_FORMAT_CUSTOM_NAME="u-boot-sunxi-with-spl.bin"
+
+# Kernel
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_CUSTOM_VERSION=y
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.11.5"
+BR2_LINUX_KERNEL_DEFCONFIG="sunxi"
+BR2_LINUX_KERNEL_DTS_SUPPORT=y
+BR2_LINUX_KERNEL_INTREE_DTS_NAME="sun8i-h3-nanopi-m1"
+
+# Filesystem
+BR2_TARGET_ROOTFS_EXT2=y
+BR2_TARGET_ROOTFS_EXT2_4=y
+BR2_TARGET_UBOOT_BOOT_SCRIPT=y
+BR2_TARGET_UBOOT_BOOT_SCRIPT_SOURCE="board/friendlyarm/nanopi-m1/boot.cmd"
+BR2_ROOTFS_POST_IMAGE_SCRIPT="support/scripts/genimage.sh"
+BR2_ROOTFS_POST_SCRIPT_ARGS="-c board/friendlyarm/nanopi-m1/genimage.cfg"
+# BR2_TARGET_ROOTFS_TAR is not set
+
+# Additional tools
+BR2_PACKAGE_HOST_DOSFSTOOLS=y
+BR2_PACKAGE_HOST_GENIMAGE=y
+BR2_PACKAGE_HOST_MTOOLS=y