Fix host 64-bit ISA string

Bug: 17185619, 15358152

(cherry picked from commit 60ffbcac792f3a2de687e85ab4aaccffe5264b21)

Change-Id: I08faa0b7368834e264ef05b4ea3bce1c3237876a
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