regression 1012: gracefully close subtest case

Usually, all test subcases are marked by the pair
`Do_ADBG_BeginSubCase()` and `Do_ADBG_EndSubCase()` which
formats the output of each test execution.

This patch adds the missing ending routine to regression 1012 subset.

Signed-off-by: Ovidiu Mihalachi <ovidiu_mihalachi@mentor.com>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>
diff --git a/host/xtest/regression_1000.c b/host/xtest/regression_1000.c
index 73cc4ad..86f69c3 100644
--- a/host/xtest/regression_1000.c
+++ b/host/xtest/regression_1000.c
@@ -1010,6 +1010,7 @@
 
 		TEEC_CloseSession(&session1);
 	}
+	Do_ADBG_EndSubCase(c, "Single Instance Multi Session");
 }
 ADBG_CASE_DEFINE(regression, 1012, xtest_tee_test_1012,
 		"Test Single Instance Multi Session features with SIMS TA");