chroot: fix bashism

possible bashism in scripts/chroot.sh line 235 (should be 'b = a'):
	if [ "x${deb_arch}" == "xarmel" ] || [ "x${deb_arch}" == "xarmhf" ] ; then
possible bashism in scripts/chroot.sh line 238 (should be 'b = a'):
	if [ "x${deb_arch}" == "xarm64" ] ; then

fixes: https://github.com/RobertCNelson/omap-image-builder/issues/64



Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

scripts/chroot.sh

@@ -232,10 +232,10 @@ trap chroot_stopped EXIT
 check_defines
 
 if [ "x${host_arch}" != "xarmv7l" ] && [ "x${host_arch}" != "xaarch64" ] ; then
-	if [ "x${deb_arch}" == "xarmel" ] || [ "x${deb_arch}" == "xarmhf" ] ; then
+	if [ "x${deb_arch}" = "xarmel" ] || [ "x${deb_arch}" = "xarmhf" ] ; then
 		sudo cp $(which qemu-arm-static) "${tempdir}/usr/bin/"
 	fi
-	if [ "x${deb_arch}" == "xarm64" ] ; then
+	if [ "x${deb_arch}" = "xarm64" ] ; then
 		sudo cp $(which qemu-aarch64-static) "${tempdir}/usr/bin/"
 	fi
 fi