[flex] Add a link to upstream tracker for patch 0

[Petr Machata]

commit 10db3f4a597591bfa257025b77039527ce42ce81
Author: Petr Machata <pmachata at redhat.com>
Date:   Wed Aug 1 01:40:40 2012 +0200

    Add a link to upstream tracker for patch 0

 flex.spec |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/flex.spec b/flex.spec
index fd07a00..d68b1ca 100644
--- a/flex.spec
+++ b/flex.spec
@@ -6,7 +6,10 @@ License: BSD
 Group: Development/Tools
 URL: http://flex.sourceforge.net/
 Source: http://downloads.sourceforge.net/%{name}/%{name}-%{version}.tar.bz2
+
+# https://sourceforge.net/tracker/?func=detail&aid=3546447&group_id=97492&atid=618177
 Patch0: flex-2.5.36-bison-2.6.1.patch
+
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 Requires: m4
 BuildRequires: gettext bison m4