avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/scripts/basic/Makefile

@@ -0,0 +1,18 @@
+###
+# Makefile.basic lists the most basic programs used during the build process.
+# The programs listed herein are what are needed to do the basic stuff,
+# such as fix file dependencies.
+# This initial step is needed to avoid files to be recompiled
+# when kernel configuration changes (which is what happens when
+# .config is included by main Makefile.
+# ---------------------------------------------------------------------------
+# fixdep: 	 Used to generate dependency information during build process
+#
+# SPDX-License-Identifier:	GPL-2.0
+#
+
+hostprogs-y	:= fixdep
+always		:= $(hostprogs-y)
+
+# fixdep is needed to compile other host programs
+$(addprefix $(obj)/,$(filter-out fixdep,$(always))): $(obj)/fixdep