Propagate errors from integration tests scripts.

Test: Presubmits.
Change-Id: Ie1f83c562a357e472bcaa95a4c1567a3e974d496
diff --git a/tests/run_integration_tests.sh b/tests/run_integration_tests.sh
index db24037..76b324b 100755
--- a/tests/run_integration_tests.sh
+++ b/tests/run_integration_tests.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/bash -eu
 
 TOP="$(readlink -f "$(dirname "$0")"/../../..)"
 "$TOP/build/soong/tests/bootstrap_test.sh"