config vvv script to adopt FHS

vvv-FHS-start.sh

#!/bin/sh

# Resolve the script location (symlink-safe)
SCRIPT_DIR="$(cd "$(dirname "$(readlink -f "$0")")" && pwd)"
# Set the root of the app (we assume bin/ is next to lib/)
VVV_ROOT="$(dirname "$SCRIPT_DIR")/lib/vvv"
# Change directory to where the actual app lives
cd "$VVV_ROOT" || exit 1
# Set up environment
export LD_LIBRARY_PATH="$VVV_ROOT/firebird"
export FIREBIRD="$VVV_ROOT"
# Launch the app
exec "$VVV_ROOT/vvv"