change DEFAULT_GRUB_CMDLINE_LINUX according to var sonic_kdump_enable

Author: sun-siyuan

installer/x86_64/install.sh

@@ -125,6 +125,9 @@ if [ "$install_env" = "onie" ]; then
     onie_initrd_tmp=/
 fi
 
+enable_kdump="%%ENABLE_KDUMP%%"
+KDUMP_PARAM="crashkernel=256M"
+
 # The build system prepares this script by replacing %%DEMO-TYPE%%
 # with "OS" or "DIAG".
 demo_type="%%DEMO_TYPE%%"
@@ -536,7 +539,11 @@ trap_push "rm $grub_cfg || true"
 [ -r ./platform.conf ] && . ./platform.conf
 
 DEFAULT_GRUB_SERIAL_COMMAND="serial --port=${CONSOLE_PORT} --speed=${CONSOLE_SPEED} --word=8 --parity=no --stop=1"
-DEFAULT_GRUB_CMDLINE_LINUX="console=tty0 console=ttyS${CONSOLE_DEV},${CONSOLE_SPEED}n8 quiet"
+if [ $enable_kdump = "y" ];then
+    DEFAULT_GRUB_CMDLINE_LINUX="console=tty0 console=ttyS${CONSOLE_DEV},${CONSOLE_SPEED}n8 ${KDUMP_PARAM} quiet"
+else
+    DEFAULT_GRUB_CMDLINE_LINUX="console=tty0 console=ttyS${CONSOLE_DEV},${CONSOLE_SPEED}n8 quiet"
+fi
 GRUB_SERIAL_COMMAND=${GRUB_SERIAL_COMMAND:-"$DEFAULT_GRUB_SERIAL_COMMAND"}
 GRUB_CMDLINE_LINUX=${GRUB_CMDLINE_LINUX:-"$DEFAULT_GRUB_CMDLINE_LINUX"}
 export GRUB_SERIAL_COMMAND

onie-mk-demo.sh

@@ -89,10 +89,8 @@ output_raw_image=$(cat onie-image.conf | grep OUTPUT_RAW_IMAGE | cut -f2 -d"=")
 output_raw_image=$(eval echo $output_raw_image)
 
 # Tailor the demo installer for OS mode or DIAG mode
-if [ $sonic_kdump_enable = "y" ]; then
-    sed -i "s/[^M] quiet/ crashkernel=256M quiet/" $tmp_installdir/install.sh
-fi
-sed -i -e "s/%%DEMO_TYPE%%/$demo_type/g" \
+sed -i -e "s/%%ENABLE_KDUMP%%/$sonic_kdump_enable/g" \
+       -e "s/%%DEMO_TYPE%%/$demo_type/g" \
        -e "s/%%IMAGE_VERSION%%/$image_version/g" \
        -e "s/%%ONIE_IMAGE_PART_SIZE%%/$onie_image_part_size/" \
        -e "s/%%EXTRA_CMDLINE_LINUX%%/$EXTRA_CMDLINE_LINUX/" \