deps: Fix building of libnice and libdatachannel

Signed-off-by: Steffen Vogel <steffen.vogel@opal-rt.com>

Author: steffen-vogel-opalrt

packaging/deps.sh

@@ -65,7 +65,7 @@ should_build() {
 ## Build configuration
 
 # Use shallow git clones to speed up downloads
-GIT_OPTS+=" --depth=1 --config advice.detachedHead=false"
+GIT_OPTS+=" --depth=1 --recurse-submodules --shallow-submodules --config advice.detachedHead=false"
 
 # Install destination
 PREFIX=${PREFIX:-/usr/local}