Exit with a value of 1 when cd fails in the init script

Exiting with 0 when cd fails is likely to be incorrectly interpreted
as success so we should exit with a non-zero value. Ideally, the init
script status action would exit with 4 but, at the point when
the cd is performed, we don’t even know if we’re running as an init
script. Exiting with 1 seems to be a reasonable compromise as it’s
fine for the non init-script case as well as being correct for all
init script actions other than status.

See gh-4653

spring-boot-tools/spring-boot-loader-tools/src/main/resources/org/springframework/boot/loader/tools/launch.script

@@ -29,16 +29,16 @@ WORKING_DIR="$(pwd)"
 [[ -n "$APP_NAME" ]] && identity="$APP_NAME"
 
 # Follow symlinks to find the real jar and detect init.d script
-cd "$(dirname "$0")" || exit
+cd "$(dirname "$0")" || exit 1
 [[ -z "$jarfile" ]] && jarfile=$(pwd)/$(basename "$0")
 while [[ -L "$jarfile" ]]; do
   [[ "$jarfile" =~ init\.d ]] && init_script=$(basename "$jarfile")
   jarfile=$(readlink "$jarfile")
-  cd "$(dirname "$jarfile")" || exit
+  cd "$(dirname "$jarfile")" || exit 1
   jarfile=$(pwd)/$(basename "$jarfile")
 done
 jarfolder="$(dirname "$jarfile")"
-cd "$WORKING_DIR" || exit
+cd "$WORKING_DIR" || exit 1
 
 # Source any config file
 configfile="$(basename "${jarfile%.*}.conf")"