add version.pm to miniperl_top path

Fetch from: http://github.com/arsv/perl-cross/commit/f53a9f1b613b84396d174855f6c37bf04f76bae3
See discussion: https://github.com/arsv/perl-cross/issues/18

Signed-off-by: Francois Perrad <francois.perrad@gadz.org>

--- a/miniperl_top
+++ b/miniperl_top
@@ -39,4 +39,5 @@ exec $top/miniperl\
 	-I$top/dist/Carp/lib\
 	-I$top/cpan/podlators/lib\
 	-I$top/cpan/parent/lib\
+	-I$top/cpan/version/lib\
 	"$@"