core124: fix updater

fix some missing files on arm
remove not needed rebuild initrd because we ship it already built

Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>

config/rootfiles/core/124/update.sh

@@ -106,16 +106,15 @@ ldconfig
 # Reload sysctl.conf
 sysctl -p
 
-# rebuild initrd to add early microcode updates
-rebuild-initrd
-
 # Remove deprecated GRUB configuration option
 if [ -e "/etc/default/grub" ]; then
 	sed -e "/^GRUB_FONT/d" -i /etc/default/grub
 fi
 
 # Update bootloader
+if [ -e /usr/bin/install-bootloader ]; then
 /usr/bin/install-bootloader
+fi
 
 # Upadate Kernel version uEnv.txt
 if [ -e /boot/uEnv.txt ]; then