board/qemu/{x86, x86_64}: fix shellcheck warning in post-build.sh

This removes a warning reported by shellcheck: "Double quote to prevent
globbing and word splitting". As a result, the file can be removed from
.checkpackageignore.

Signed-off-by: Scott Fan <fancp2007@gmail.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>

.checkpackageignore

@@ -48,8 +48,6 @@ board/orangepi/orangepi-zero/patches/linux/0002-ARM-dts-orange-pi-zero-enable-sp
 board/orangepi/orangepi-zero/patches/linux/0003-ARM-dts-orange-pi-zero-enable-spidev.patch lib_patch.Upstream
 board/orangepi/orangepi-zero/patches/linux/0004-ARM-dts-orange-pi-zero-enable-uart.patch lib_patch.Upstream
 board/qemu/aarch64-sbsa/assemble-flash-images Shellcheck
-board/qemu/x86/post-build.sh Shellcheck
-board/qemu/x86_64/post-build.sh Shellcheck
 board/raspberrypi/post-build.sh Shellcheck
 board/raspberrypi/post-image.sh Shellcheck
 board/roseapplepi/patches/uboot/0001-compiler-.h-sync-include-linux-compiler-.h-with-Linu.patch lib_patch.Upstream

board/qemu/x86/post-build.sh

@@ -4,8 +4,8 @@ set -u
 set -e
 
 # Add a console on tty1
-if [ -e ${TARGET_DIR}/etc/inittab ]; then
-    grep -qE '^tty1::' ${TARGET_DIR}/etc/inittab || \
+if [ -e "${TARGET_DIR}/etc/inittab" ]; then
+    grep -qE '^tty1::' "${TARGET_DIR}/etc/inittab" || \
 	sed -i '/GENERIC_SERIAL/a\
-tty1::respawn:/sbin/getty -L  tty1 0 vt100 # QEMU graphical window' ${TARGET_DIR}/etc/inittab
+tty1::respawn:/sbin/getty -L  tty1 0 vt100 # QEMU graphical window' "${TARGET_DIR}/etc/inittab"
 fi

board/qemu/x86_64/post-build.sh

@@ -4,8 +4,8 @@ set -u
 set -e
 
 # Add a console on tty1
-if [ -e ${TARGET_DIR}/etc/inittab ]; then
-    grep -qE '^tty1::' ${TARGET_DIR}/etc/inittab || \
+if [ -e "${TARGET_DIR}/etc/inittab" ]; then
+    grep -qE '^tty1::' "${TARGET_DIR}/etc/inittab" || \
 	sed -i '/GENERIC_SERIAL/a\
-tty1::respawn:/sbin/getty -L  tty1 0 vt100 # QEMU graphical window' ${TARGET_DIR}/etc/inittab
+tty1::respawn:/sbin/getty -L  tty1 0 vt100 # QEMU graphical window' "${TARGET_DIR}/etc/inittab"
 fi