Fix host 64-bit ISA string

Bug: 17185619, 15358152

Change-Id: I5b80e36890abf659634c38ec7dd6fa336bf8a75a
diff --git a/test/etc/host-run-test-jar b/test/etc/host-run-test-jar
index 2241f85..ce85eb0 100755
--- a/test/etc/host-run-test-jar
+++ b/test/etc/host-run-test-jar
@@ -76,7 +76,7 @@
         INTERPRETER="y"
         shift
     elif [ "x$1" = "x--64" ]; then
-        ISA="x64"
+        ISA="x86_64"
         exe="${ANDROID_HOST_OUT}/bin/dalvikvm64"
         shift
     elif [ "x$1" = "x--no-verify" ]; then