Increase test timeout to 30 minutes

It has been observed that the execution time for the test varies.
Icrease the timeout to ensure that the build doesn't get killed halfway
through.

Signed-off-by: Ritesh Raj Sarraf <ritesh.sarraf@collabora.com>

test-cases/sdk-cross-compilation.yaml

@@ -25,7 +25,7 @@ run:
     - "# Enter test directory:"
     - cd sdk
     - "# Execute the following commands:"
-    - common/run-test-in-systemd --user=user --basename -- cross/cross-compile.sh /opt/devroot
+    - common/run-test-in-systemd --user=user --timeout=30min --basename -- cross/cross-compile.sh /opt/devroot
 
 parse:
   fixupdict: