bluez: Update to version 5.51

Signed-off-by: Bruno Randolf <br1@einfach.org>

utils/bluez/patches/004-Move-the-43xx-firmware-into-lib-firmware.patch

@@ -7,9 +7,11 @@ Subject: [PATCH 4/4] Move the 43xx firmware into /lib/firmware
  tools/hciattach_bcm43xx.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)
 
---- a/tools/hciattach_bcm43xx.c
-+++ b/tools/hciattach_bcm43xx.c
-@@ -43,7 +43,7 @@
+Index: bluez-5.51/tools/hciattach_bcm43xx.c
+===================================================================
+--- bluez-5.51.orig/tools/hciattach_bcm43xx.c
++++ bluez-5.51/tools/hciattach_bcm43xx.c
+@@ -44,7 +44,7 @@
  #include "hciattach.h"
  
  #ifndef FIRMWARE_DIR