Add vera rules to check consecutive and trailing empty lines (#3540)

JerryScript-DCO-1.0-Signed-off-by: Dániel Bátyai dbatyai@inf.u-szeged.hu

tests/unit-core/test-context-data.c

@@ -113,7 +113,6 @@ test_context_data4_new (void *user_data_p)
   TEST_ASSERT (user_data_p == NULL);
 } /* test_context_data4_new */
 
-
 static void
 test_context_data4_free (void *user_data_p)
 {
@@ -138,7 +137,6 @@ static const jerry_context_data_manager_t manager4 =
   .bytes_needed = 0
 };
 
-
 int
 main (void)
 {