fix(toolchain): don't pick ELF files to modify on Alpine Linux

Issues: #3

toolchain/setup_toolchain.sh

@@ -176,6 +176,9 @@ function configure_toolchain() {
 	local current_path
 	current_path="$(pwd)"
 	while read -r file; do
+		if "${readelf}" -h "${file}" &>/dev/null; then
+			continue
+		fi
 		sed -i "s|/opt/toolchain|${current_path}|g" "${file}"
 	done < <(
 		find . -type f -exec grep -E -I -l $'[=\'" ]/opt/toolchain' {} \;