Increase timeout for vld/vst tests

Change-Id: I8871f968851eb2f1bea7e424546ec4a09fd67f93

tests/kelvin_isa/BUILD

diff --git a/tests/kelvin_isa/BUILD b/tests/kelvin_isa/BUILD
index 696000a..b606fad 100644
--- a/tests/kelvin_isa/BUILD
+++ b/tests/kelvin_isa/BUILD
@@ -310,6 +310,7 @@
     deps = [
         ":kelvin_test",
     ],
+    hw_test_size = "large",
     tags = ["tcm-incompatible"],
 )
 
@@ -412,6 +413,7 @@
     deps = [
         ":kelvin_test",
     ],
+    hw_test_size = "large",
     tags = ["tcm-incompatible"],
 )