Don't leave ghosts of x86_partition if the test fails.

Demo_FixedPoint_and_TestAutomation/regression.sh

@@ -4,6 +4,9 @@ cp -a testSimulinkResponses.py binary.c/binaries/ground-GUI/ || exit 1
 cd binary.c/binaries/ || exit 1
 ./x86_partition & 2>/dev/null
 cd ground-GUI || exit 1
-timeout 30 ./testSimulinkResponses.py 2>/dev/null || exit 1
+timeout 30 ./testSimulinkResponses.py 2>/dev/null || {
+    killall x86_partition
+    exit 1
+}
 killall x86_partition
 exit 0