rpi-userland: Bump version

Bump version to f9e6f9f3def8dc18dc0092cd695ccf53b8ba3efe and revert local commit
f22830e456833e98e11f09d2aa38017f5aaa557c 'rpi-userland: add patch fix missing
libvcilcs install rules' in order to replace the local patch from this commit by
the upstream commit 1ecc49c97b7be3d524cb4cfc97401f16b485a4ee 'vmcs_host: Fix
missing install of libvcilcs.so'.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
rpi-userland: .mk: Indent rules with tabs

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
iproute2: bump to version 3.16.0

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Tested-by: Fabio Porcedda <fabio.porcedda@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
gdb: allow building on AArch64 systems

gdb has had AArch64 support since 7.6 which is now the default minimum
version of GDB in the tree. Older versions are now legacy.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>