Make the script bash because it uses PIPESTATUS.

Change-Id: Idc85935e0d9eebc96faed5112b5a0af8cf53192c
diff --git a/test/etc/host-run-test-jar b/test/etc/host-run-test-jar
index d2b3fb1..c020478 100755
--- a/test/etc/host-run-test-jar
+++ b/test/etc/host-run-test-jar
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 #
 # Run the code in test.jar using the host-mode virtual machine. The jar should
 # contain a top-level class named Main to run.
@@ -234,4 +234,4 @@
   if [ ${PIPESTATUS[0]} = 124 ] && [ "$TIME_OUT" = "y" ]; then
     echo -e "\e[91mTEST TIMED OUT!\e[0m" >&2
   fi
-fi
\ No newline at end of file
+fi