package/google-breakpad/gen-syms.sh: fix shellcheck warnings

Fixes warning SC2068

Signed-off-by: Adam Duskett <adam.duskett@amarulasolutions.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/google-breakpad/gen-syms.sh

@@ -14,7 +14,7 @@ error() {
     exit 1
 }
 
-for FILE in ${@}; do
+for FILE in "${@}"; do
     f="${TARGET_DIR}${FILE}"
     if [ ! -e "${f}" ]; then
         error "%s: No such file or directory\n" "${FILE}"