gnu: flex: Update to 2.6.0.

* gnu/packages/flex.scm (flex): Update to 2.6.0.
[source]: Remove flex-bison-tests.patch.
* gnu-system.am (dist_patch_DATA): Remove flex-bison-tests.patch.
* gnu/packages/patches/flex-bison-tests.patch: Remove it.

gnu-system.am

@@ -463,7 +463,6 @@ dist_patch_DATA =						\
   gnu/packages/patches/findutils-localstatedir.patch		\
   gnu/packages/patches/findutils-test-xargs.patch		\
   gnu/packages/patches/flashrom-use-libftdi1.patch		\
-  gnu/packages/patches/flex-bison-tests.patch			\
   gnu/packages/patches/flint-ldconfig.patch			\
   gnu/packages/patches/fltk-shared-lib-defines.patch		\
   gnu/packages/patches/freeimage-CVE-2015-0852.patch		\

gnu/packages/flex.scm

@@ -1,5 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2012, 2013, 2014 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2016 Efraim Flashner <efraim@flashner.co.il>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -31,15 +32,14 @@
 (define flex
   (package
     (name "flex")
-    (version "2.5.37")
+    (version "2.6.0")
     (source (origin
              (method url-fetch)
              (uri (string-append "mirror://sourceforge/flex/flex-"
                                  version ".tar.bz2"))
              (sha256
               (base32
-               "0ah5mi4j62b85a9rllv1004mzjb5cd0mn4glvz13p88rpx77pahp"))
-             (patches (list (search-patch "flex-bison-tests.patch")))))
+               "1sdqx63yadindzafrq1w31ajblf9gl1c301g068s20s7bbpi3ri4"))))
     (build-system gnu-build-system)
     (inputs
      (let ((bison-for-tests

gnu/packages/patches/flex-bison-tests.patch

@@ -1,24 +0,0 @@
-The `test-bison-yyl{loc,val}' tests fail with "conflicting types for
-'testparse'" because `YYPARSE_PARAM' is undefined; work around that.
-
---- flex-2.5.37/tests/test-bison-yylloc/main.c	2012-11-22 18:17:01.000000000 +0100
-+++ flex-2.5.37/tests/test-bison-yylloc/main.c	2012-11-22 18:17:07.000000000 +0100
-@@ -21,6 +21,7 @@
-  * PURPOSE.
-  */
- 
-+#define YYPARSE_PARAM scanner
- #include "parser.h"
- #include "scanner.h"
- 
-
---- flex-2.5.37/tests/test-bison-yylval/main.c	2012-11-22 18:17:42.000000000 +0100
-+++ flex-2.5.37/tests/test-bison-yylval/main.c	2012-11-22 18:17:49.000000000 +0100
-@@ -21,6 +21,7 @@
-  * PURPOSE.
-  */
- 
-+#define YYPARSE_PARAM scanner
- #include "parser.h"
- #include "scanner.h"
-