package/freeswitch: install to staging

Needed for upcoming package freeswitch-mod-bcg729.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
[Arnout: made comment more explicit]
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/freeswitch/freeswitch.mk

@@ -7,6 +7,8 @@
 FREESWITCH_VERSION = 1.6.19
 FREESWITCH_SOURCE = freeswitch-$(FREESWITCH_VERSION).tar.xz
 FREESWITCH_SITE = http://files.freeswitch.org/freeswitch-releases
+# External modules need headers/libs from staging
+FREESWITCH_INSTALL_STAGING = YES
 FREESWITCH_LICENSE = MPL-1.1, \
 	GPL-3.0+ with font exception (fonts), \
 	Apache-2.0 (apr, apr-util), \