Fix syntax error in shell script

Signed-off-by: Ritesh Raj Sarraf <ritesh.sarraf@collabora.com>

debian/patches/apertis/0003-Reworked-kernel-install-script.patch

@@ -68,12 +68,12 @@ Signed-off-by: Denis Pynkin <denis.pynkin@collabora.com>
  done
  
 -if [[ "${0##*/}" == 'installkernel' ]]; then
-++if [ "${0%installkernel}" != "${0}" ]; then
++if [ "${0%installkernel}" != "${0}" ]; then
      COMMAND='add'
 -    # make install doesn't pass any parameter wrt initrd handling
 -    INITRD_OPTIONS=()
-++elif [ "${0%removekernel}" != "${0}" ]; then
-++    COMMAND='remove'
++elif [ "${0%removekernel}" != "${0}" ]; then
++    COMMAND='remove'
  else
      COMMAND="$1"
      shift