Prefers readline

It's needed for older ruby (before 2.1) and works latter versions, too.

bin/ruby-build

@@ -931,13 +931,14 @@ use_freebsd_pkg() {
       # check if 11-R or later
       release="$(uname -r)"
       if [ "${release%%.*}" -ge 11 ]; then
-	  if pkg info -e libedit > /dev/null; then
+	  # prefers readline to compile most of ruby versions
+	  if pkg info -e readline > /dev/null; then
+	      # use readline from Ports Collection
+	      package_option ruby configure --with-readline-dir="/usr/local"
+	  elif pkg info -e libedit > /dev/null; then
 	      # use libedit from Ports Collection
 	      package_option ruby configure --enable-libedit
 	      package_option ruby configure --with-libedit-dir="/usr/local"
-	  elif pkg info -e readline > /dev/null; then
-	      # use readline from Ports Collection
-	      package_option ruby configure --with-readline-dir="/usr/local"
 	  fi
       fi
   fi