ci: Check out OpenOCD submodule for host tools build

Host tool build job requires the OpenOCD submodule.

Signed-off-by: Stephanos Ioannidis <[email protected]>

Author: stephanosio

.github/workflows/ci.yml

@@ -1076,6 +1076,7 @@ jobs:
         git submodule update --depth=1 --recursive qemu
         git submodule update --depth=1 --recursive qemu_arc
         git submodule update --depth=1 --recursive qemu_xilinx
+        git submodule update --depth=1 --recursive openocd
 
     - name: Configure AWS Credentials
       uses: aws-actions/configure-aws-credentials@v4