Add FIRST BSD license to repo and include with examples (#109)

LICENSE.txt

@@ -0,0 +1,24 @@
+Copyright (c) 2009-2019 FIRST
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+    * Neither the name of the FIRST nor the
+      names of its contributors may be used to endorse or promote products
+      derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY FIRST AND CONTRIBUTORS``AS IS'' AND ANY
+EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY NONINFRINGEMENT AND FITNESS FOR A PARTICULAR
+PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL FIRST OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

stage4/01-sys-tweaks/01-run.sh

@@ -59,11 +59,17 @@ export PKG_CONFIG_LIBDIR=${ROOTFS_DIR}/usr/lib/arm-linux-gnueabihf/pkgconfig:${R
 
 sh -c "cd ${BASE_DIR}/deps && tar cf - examples" | \
     sh -c "cd ${ROOTFS_DIR}/home/pi && tar xf -"
+for dir in ${ROOTFS_DIR}/home/pi/examples/*; do
+    cp "${BASE_DIR}/LICENSE.txt" "${dir}/"
+done
 chown -R 1000:1000 "${ROOTFS_DIR}/home/pi/examples"
 
 rm -rf "${STAGE_WORK_DIR}/examples"
 sh -c "cd ${BASE_DIR}/deps && tar cf - examples" | \
     sh -c "cd ${STAGE_WORK_DIR} && tar xf -"
+for dir in ${STAGE_WORK_DIR}/examples/*; do
+    cp "${BASE_DIR}/LICENSE.txt" "${dir}/"
+done
 
 # build zips
 pushd "${STAGE_WORK_DIR}/examples"