more fixes to the bionic ci (update your distros ffs)

docker_builds/ubuntu_bionic/do_build.sh

@@ -12,7 +12,7 @@ apt update
 # Install dependencies and tools
 apt install -y build-essential cmake git libfftw3-dev libglfw3-dev libvolk1-dev libzstd-dev libsoapysdr-dev libairspy-dev \
             libiio-dev libad9361-dev librtaudio-dev libhackrf-dev librtlsdr-dev libbladerf-dev liblimesuite-dev p7zip-full wget portaudio19-dev \
-            libcodec2-dev
+            libcodec2-dev libudev-dev
 
 # Install SDRPlay libraries
 wget https://www.sdrplay.com/software/SDRplay_RSP_API-Linux-3.07.1.run