Some cleanup for tests 960-965 build scripts.

Make all 96* build scripts consistent and update 965 to build and run
with jack.

Change-Id: If27ee9c92880c75307a18b054ba926670877073a
diff --git a/test/964-default-iface-init-generated/build b/test/964-default-iface-init-generated/build
index d916f1b..0780da1 100755
--- a/test/964-default-iface-init-generated/build
+++ b/test/964-default-iface-init-generated/build
@@ -29,18 +29,19 @@
 # Generate the smali files and expected.txt or fail
 ./util-src/generate_smali.py ./smali ./expected.txt
 
-USES_JAVA="false"
+# Should we compile with Java source code. By default we will use Smali.
+USES_JAVA_SOURCE="false"
 if [[ $@ == *"--jvm"* ]]; then
-  USES_JAVA="true"
+  USES_JAVA_SOURCE="true"
 elif [[ "$USE_JACK" == "true" ]]; then
   if $JACK -D jack.java.source.version=1.8 2>/dev/null; then
-    USES_JAVA="true"
+    USES_JAVA_SOURCE="true"
   else
     echo "WARNING: Cannot use jack because it does not support JLS 1.8. Falling back to smali" >&2
   fi
 fi
 
-if [[ "$USES_JAVA" == "true" ]]; then
+if [[ "$USES_JAVA_SOURCE" == "true" ]]; then
   # We are compiling java code, create it.
   mkdir -p src
   ${ANDROID_BUILD_TOP}/art/tools/extract-embedded-java ./smali ./src