BASERUBY have to be 1.9 or later at least [Bug #16845]

Many tools under tool directory haven't worked with ruby 1.8.

configure.ac

@@ -34,11 +34,9 @@ AC_ARG_WITH(baseruby,
 	[
 		AC_PATH_PROG([BASERUBY], [ruby], [false])
 	])
-AS_IF([test "$HAVE_BASERUBY" = yes -a "`RUBYOPT=- $BASERUBY -e 'print 42' 2>/dev/null`" = 42], [
-    AS_IF([test "`RUBYOPT=- $BASERUBY --disable=gems -e 'print 42' 2>/dev/null`" = 42], [
-	BASERUBY="$BASERUBY --disable=gems"
-        BASERUBY_VERSION=`$BASERUBY -v`
-    ])
+AS_IF([test "$HAVE_BASERUBY" = yes -a "`RUBYOPT=- $BASERUBY --disable=gems -e 'print 42' 2>/dev/null`" = 42], [
+    BASERUBY="$BASERUBY --disable=gems"
+    BASERUBY_VERSION=`$BASERUBY -v`
     $BASERUBY -C "$srcdir" tool/downloader.rb -d tool -e gnu config.guess config.sub >&AS_MESSAGE_FD
 ], [
     BASERUBY="echo executable host ruby is required.  use --with-baseruby option.; false"