build: export final DTS and Kconfig files used in the build

This commit exports the merged device tree source (DTS) and Kconfig
files as used by the build process to the 'firmwares/' directory for
documentation purposes.

Signed-off-by: Luca Burelli <[email protected]>

Author: pillo79

extra/build.sh

@@ -82,12 +82,15 @@ line_comment_only='^\s*\/\*' # match lines starting with comment
 line_continuation='\\$' # match lines ending with '\'
 c_comment='\s*\/\*.*?\*\/' # match C-style comments and any preceding space
 perl -i -pe "s/${c_comment}//gs unless /${line_preproc_ok}/ || (/${line_comment_only}/ && !/${line_continuation}/)" $(find ${VARIANT_DIR}/llext-edk/include/ -type f)
+
 for ext in elf bin hex; do
     rm -f firmwares/zephyr-$variant.$ext
     if [ -f ${BUILD_DIR}/zephyr/zephyr.$ext ]; then
         cp ${BUILD_DIR}/zephyr/zephyr.$ext firmwares/zephyr-$variant.$ext
     fi
 done
+cp ${BUILD_DIR}/zephyr/zephyr.dts firmwares/zephyr-$variant.dts
+cp ${BUILD_DIR}/zephyr/.config firmwares/zephyr-$variant.config
 
 # Generate the provides.ld file for linked builds
 echo "Generating exported symbol scripts"