package/libbroadvoice: switch to github

https://developer.signalwire.com/freeswitch/FreeSWITCH-Explained/Installation/Linux/Deprecated-Installation-Instructions/25460805/
"FreeSWITCH project has been moved to GitHub"

Updated hash due to switch to github.

Fixes:
https://autobuild.buildroot.org/results/b4ea75a8bf113409b6c890d422b99c2bb49c3ecf/

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Julien Olivain <ju.o@free.fr>

package/libbroadvoice/libbroadvoice.hash

@@ -1,3 +1,3 @@
 # Locally computed
-sha256  74b7c9bbf90d2d8d8ec9befe73066f5c0d734498f586f6c870eb24dff2edcad7  libbroadvoice-f65b0f50c8c767229fbf1758370880abc0d78564-git4.tar.gz
+sha256  39fd8a5f76598f2cb23b759bcd458a45a99e6ff830471576a2485c98b2ab1e48  libbroadvoice-f65b0f50c8c767229fbf1758370880abc0d78564.tar.gz
 sha256  2550586c993ce4a8c23c8b11968ea36192116a896a2504799cc65307d769c094  COPYING

package/libbroadvoice/libbroadvoice.mk

@@ -9,8 +9,7 @@ LIBBROADVOICE_VERSION = f65b0f50c8c767229fbf1758370880abc0d78564
 # "This library is based on the Broadcom reference code, but has been
 # heavily modified so that it builds into a proper library, with a clean
 # usable interface, on a range of platforms."
-LIBBROADVOICE_SITE = https://freeswitch.org/stash/scm/sd/libbroadvoice.git
-LIBBROADVOICE_SITE_METHOD = git
+LIBBROADVOICE_SITE = $(call github,freeswitch,libbroadvoice,$(LIBBROADVOICE_VERSION))
 LIBBROADVOICE_LICENSE = LGPL-2.1
 LIBBROADVOICE_LICENSE_FILES = COPYING
 LIBBROADVOICE_AUTORECONF = YES