binutils: Don't link to libfl as it's unnecessary

AM_PROG_LEX sets this for some weird reason; it should
look for a program only and not a library.  Then later
it gets linked to ar, ranlib, dlltool, windres, windmc
and itbl-test despite nothing in the code #include'ing
FlexLexer.h

This isn't a big deal but it did cause a build failure
on Cygwin as it triggered a bug with their flex package
dependencies which I reported at:

https://www.cygwin.com/ml/cygwin/2015-10/msg00433.html

Arguably I should remove all traces of LIBLEX in each
Makefile.am instead?

Signed-off-by: Ray Donnelly <mingw.android@gmail.com>

patches/binutils/2.25.1/330-Dont-link-to-libfl-as-its-unnecessary.patch

@@ -0,0 +1,102 @@
+diff -urN binutils-2.25.1.orig/binutils/configure binutils-2.25.1/binutils/configure
+--- binutils-2.25.1.orig/binutils/configure	2015-10-25 13:18:46.249052806 +0000
++++ binutils-2.25.1/binutils/configure	2015-10-25 13:39:21.339034801 +0000
+@@ -12067,6 +12067,7 @@
+ done
+ test -n "$YACC" || YACC="yacc"
+ 
++save_LIBS=$LIBS
+ for ac_prog in flex lex
+ do
+   # Extract the first word of "$ac_prog", so it can be a program name with args.
+@@ -12227,6 +12228,8 @@
+ if test "$LEX" = :; then
+   LEX=${am_missing_run}flex
+ fi
++LIBS=$save_LIBS
++LEXLIB=
+ 
+ ALL_LINGUAS="bg da es fi fr id it ja ro ru rw sk sv tr uk vi zh_CN zh_TW hr"
+ # If we haven't got the data from the intl directory,
+diff -urN binutils-2.25.1.orig/binutils/configure.ac binutils-2.25.1/binutils/configure.ac
+--- binutils-2.25.1.orig/binutils/configure.ac	2015-10-25 13:18:46.249052806 +0000
++++ binutils-2.25.1/binutils/configure.ac	2015-10-25 13:38:52.969035216 +0000
+@@ -87,7 +87,10 @@
+ fi
+ 
+ AC_PROG_YACC
++save_LIBS=$LIBS
+ AM_PROG_LEX
++LIBS=$save_LIBS
++LEXLIB=
+ 
+ ALL_LINGUAS="bg da es fi fr id it ja ro ru rw sk sv tr uk vi zh_CN zh_TW hr"
+ ZW_GNU_GETTEXT_SISTER_DIR
+diff -urN binutils-2.25.1.orig/gas/configure binutils-2.25.1/gas/configure
+--- binutils-2.25.1.orig/gas/configure	2015-10-25 13:18:46.389052803 +0000
++++ binutils-2.25.1/gas/configure	2015-10-25 15:16:55.988949456 +0000
+@@ -12795,6 +12795,7 @@
+ done
+ test -n "$YACC" || YACC="yacc"
+ 
++save_LIBS=$LIBS
+ for ac_prog in flex lex
+ do
+   # Extract the first word of "$ac_prog", so it can be a program name with args.
+@@ -12955,6 +12956,8 @@
+ if test "$LEX" = :; then
+   LEX=${am_missing_run}flex
+ fi
++LIBS=$save_LIBS
++LEXLIB=
+ 
+ ALL_LINGUAS="fr tr es rw id ru fi ja"
+ # If we haven't got the data from the intl directory,
+diff -urN binutils-2.25.1.orig/gas/configure.ac binutils-2.25.1/gas/configure.ac
+--- binutils-2.25.1.orig/gas/configure.ac	2015-10-25 15:15:06.000000000 +0000
++++ binutils-2.25.1/gas/configure.ac	2015-10-25 14:45:32.000000000 +0000
+@@ -717,7 +717,10 @@
+ AC_DEFINE_UNQUOTED(TARGET_OS,		"${target_os}",    [Target OS.])
+ 
+ AC_PROG_YACC
++save_LIBS=$LIBS
+ AM_PROG_LEX
++LIBS=$save_LIBS
++LEXLIB=
+ 
+ ALL_LINGUAS="fr tr es rw id ru fi ja"
+ ZW_GNU_GETTEXT_SISTER_DIR
+diff -urN binutils-2.25.1.orig/ld/configure binutils-2.25.1/ld/configure
+--- binutils-2.25.1.orig/ld/configure	2015-10-25 13:18:47.399052788 +0000
++++ binutils-2.25.1/ld/configure	2015-10-25 15:17:06.472282637 +0000
+@@ -16071,6 +16071,7 @@
+ done
+ test -n "$YACC" || YACC="yacc"
+ 
++save_LIBS=$LIBS
+ for ac_prog in flex lex
+ do
+   # Extract the first word of "$ac_prog", so it can be a program name with args.
+@@ -16231,6 +16232,8 @@
+ if test "$LEX" = :; then
+   LEX=${am_missing_run}flex
+ fi
++LIBS=$save_LIBS
++LEXLIB=
+ 
+ 
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to enable maintainer-specific portions of Makefiles" >&5
+diff -urN binutils-2.25.1.orig/ld/configure.ac binutils-2.25.1/ld/configure.ac
+--- binutils-2.25.1.orig/ld/configure.ac	2015-10-25 13:18:47.415719456 +0000
++++ binutils-2.25.1/ld/configure.ac	2015-10-25 15:14:43.000000000 +0000
+@@ -173,7 +173,10 @@
+ AC_EXEEXT
+ 
+ AC_PROG_YACC
++save_LIBS=$LIBS
+ AM_PROG_LEX
++LIBS=$save_LIBS
++LEXLIB=
+ 
+ AM_MAINTAINER_MODE
+ AM_CONDITIONAL(GENINSRC_NEVER, false)