Ports: Update flex's patches to use git patches

Ports/flex/patches/0002-Don-t-use-libc-s-regex.patch

@@ -0,0 +1,34 @@
+From 1e80ecd820c3a16ffeb99ac0587d996b13784062 Mon Sep 17 00:00:00 2001
+From: Brian Callahan <bcallah@openbsd.org>
+Date: Thu, 23 Jan 2020 23:43:31 -0500
+Subject: [PATCH 2/6] Don't use libc's regex
+
+---
+ configure | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/configure b/configure
+index d88c47c..90e013f 100755
+--- a/configure
++++ b/configure
+@@ -19854,7 +19854,7 @@ fi
+ 
+ # checks for headers
+ 
+-for ac_header in regex.h strings.h sys/stat.h sys/wait.h unistd.h
++for ac_header in pcre2posix.h strings.h sys/stat.h sys/wait.h unistd.h
+ do :
+   as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
+ ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
+@@ -20739,7 +20739,7 @@ if test "$cross_compiling" = yes; then :
+ $as_echo "$as_me: WARNING: result $ac_cv_func_realloc_0_nonnull guessed because of cross compilation" >&2;}
+ fi
+ 
+-for ac_func in dup2 memset regcomp strcasecmp strchr strdup strtol
++for ac_func in dup2 memset strcasecmp strchr strdup strtol
+ do :
+   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
+ ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
+-- 
+2.36.1
+