Change "VPX" to "AOM"

Change-Id: I6593a44de3b571193c2a4c8787ddf3b2fc24a268
diff --git a/test/examples.sh b/test/examples.sh
index 1ee120a..8c0aff4 100755
--- a/test/examples.sh
+++ b/test/examples.sh
@@ -24,6 +24,6 @@
 
 for test in ${example_tests}; do
   # Source each test script so that exporting variables can be avoided.
-  VPX_TEST_NAME="$(basename ${test%.*})"
+  AOM_TEST_NAME="$(basename ${test%.*})"
   . "${test}"
 done