Add support for Dex version 37 in Runtime.

We are skipping version 36 of the dex file format due to a bug in
Dalvik dating back to ICS where dex files marked version 036 would
erroneously be accepted.

Bug: 27538761
Bug: 27809626

Change-Id: Ic053f7e25f5a8c3df83ff34b6656528824b2df12
diff --git a/test/370-dex-v37/build b/test/370-dex-v37/build
new file mode 100755
index 0000000..f472428
--- /dev/null
+++ b/test/370-dex-v37/build
@@ -0,0 +1,30 @@
+#!/bin/bash
+#
+# Copyright 2015 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# make us exit on a failure
+set -e
+
+./default-build "$@"
+
+if [[ $@ != *"--jvm"* ]]; then
+  # Change the generated dex file to have a v36 magic number if it is version 35
+  if test -f classes.dex && head -c 7 classes.dex | grep -q 035; then
+    # place ascii value '037' into the classes.dex file starting at byte 4.
+    printf '037' | dd status=none conv=notrunc of=classes.dex bs=1 seek=4 count=3
+    rm -f $TEST_NAME.jar
+    zip $TEST_NAME.jar classes.dex
+  fi
+fi