Ignore missing temporary files during cleanup

Signed-off-by: Bence Szépkúti <bence.szepkuti@arm.com>
diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index a162908..51705e1 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -816,7 +816,7 @@
                 result=0
             fi
         fi
-        rm "$testbin"
+        rm -f "$testbin"
     fi
     return $result
 }