Tock: Build libtock-c lib with the build script

Signed-off-by: Alistair Francis <alistair@alistair23.me>

examples/NonArduino/Tock/build.sh

@@ -3,6 +3,10 @@ set -e
 
 rm -rf ./build
 
+cd libtock-c/libtock
+make -j4
+cd ../../
+
 mkdir -p build
 cd build