security/fprintd: fix build on recent current.

Obtained from:	0c6bab8640.patch

security/fprintd/files/patch-git_06bab8

@@ -0,0 +1,46 @@
+Obtained from:
+	https://gitlab.freedesktop.org/libfprint/fprintd/-/commit/0c6bab8640b3586ac8e1b8c35d87aa49b79719d0.patch
+
+From 0c6bab8640b3586ac8e1b8c35d87aa49b79719d0 Mon Sep 17 00:00:00 2001
+From: Bastien Nocera <hadess@hadess.net>
+Date: Thu, 23 Jan 2020 17:37:33 +0100
+Subject: [PATCH] main: Fix redeclaration linking error
+
+Fix linking error as the "store" global variable gets redeclared in
+each C file that includes the header. Move the actual declaration to
+main.c.
+
+Fixes:
+ /usr/bin/ld: ./.libs/libfprintd.a(device.o):/builds/libfprint/fprintd/src/storage.h:51: multiple definition of `store'; main.o:/builds/libfprint/fprintd/src/storage.h:51: first defined here
+---
+ src/main.c    | 2 ++
+ src/storage.h | 2 +-
+ 2 files changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/src/main.c b/src/main.c
+index 8f7e19c..ce1a47d 100644
+--- src/main.c
++++ src/main.c
+@@ -33,6 +33,8 @@
+ #include "storage.h"
+ #include "file_storage.h"
+ 
++fp_storage store;
++
+ extern DBusGConnection *fprintd_dbus_conn;
+ static gboolean no_timeout = FALSE;
+ static gboolean g_fatal_warnings = FALSE;
+diff --git a/src/storage.h b/src/storage.h
+index d908c59..28ed2b6 100644
+--- src/storage.h
++++ src/storage.h
+@@ -46,4 +46,4 @@ struct storage {
+ typedef struct storage fp_storage;
+ 
+ /* The currently setup store */
+-fp_storage store;
++extern fp_storage store;
+-- 
+GitLab
+
+