bctoolbox is a utilities library used by Belledonne Communications
softwares like belle-sip, mediastreamer2 and linphone.
Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
[Thomas: add missing dependency on BR2_INSTALL_LIBSTDCPP.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
